Science universe: Physics articles

Your skin can be left looking dull and lifeless due to poor diet, a bad skincare regime or simply through ageing. Many people try to cover up damaged or dull skin with make-up, rather than actually treating the skin condition itself, which can in turn cause further skin problems such as spots and irritation. So, it is essential that you treat the skin itself instead of covering up the problems, as this will help it to appear healthy and radiant again. Here are the three most important steps to follow for a naturally glowing complexion ... Image via Nico Paix 1. Choose the RIGHT cleanser for you To revitalise and rejuvenate the skin you should use a good cleanser which is appropriate for your skin type - what works for your friend may be doing more damage than good on your own skin, because our skin types are all so unique. Dry skin needs a moisturising cleanser for example whilst oily skin needs one that controls shine, not adds to it. You should cleanse your skin every mornin...

We all know how stressful it is when it comes to getting a new pair of glasses, it may seem as easy as walking in to the opticians, taking a test, picking a frame, paying and then returning in 2 weeks to collect them. This is almost true apart from we tend not to realise the amount of choice there is now and how many additional options are available. Eye Test You start off by booking your eye test at your chosen opticians, you should do your research, look at reviews of previous users, look at what their prices are like and what offers they have in store. Family run opticians or independent firms tend to be the most professional an best for money. It may also be an idea to walk into a few before booking your eye test to have a look at what they have on offer, the prices, and what the staff are like. You could also enquire on the average time for production. Although some opticians seem to have amazing offers they may not be the best opticians when manufacturing the lenses or on staff ...

cc licensed flickr photo shared by IPOXstudios You may believe that you are depressed because occasionally you feel sad or gloomy. However, depression is a treatable illness that affects your mind and body and every aspect of your day-to-day life and activities for a period of time. This clinical condition often requires help and treatment from a mental health professional or a doctor as well as the support of family and friends. About 19 million people in the US suffer from some form of depression. As a common medical condition, clinical depression may result from a number of factors, including your brain’s chemical imbalances, medications, genetics and hormonal and major life changes, including critical illness and divorce. People from all socio-economic backgrounds suffer from depression, with women being affected more than men. The illness also impacts the patient’s family and friends, many of whom neither understand the condition nor are able to help with the challenges it pres...

cc licensed flickr photo shared by austinevan The human body is designed to work collectively, each part of our body is responsible for our overall well-being. Our body works and develops according to the food and nutrition we provide to it. Most of the people are unaware of the fact that our eating habits have a great affect over our mind and its functioning. According to research, a person's diet is capable of enhancing cognitive abilities, counteracts the signs of old age, and provides protection against any damage to our brain. There is a great connection between the food we eat and our brain chemistry. In this article, we are going to discuss the effects food has on your body, and how to change eating habits. How food affects your mind? Our brain chemistry has a deep connection with our eating habits. Brain works by transmitting and receiving electrical impulses or brain waves; it requires neurotransmitters for carrying out these functions. There are different types of neu...

There are currently many supported living services that offer people, young and old, who suffer with physical and mental disabilities the chance to live independently.  These services are very important and offer people who are disadvantaged the opportunity of real choice and control over their own lives and also give people the freedom to pursue their own goals and aspirations in life. This includes providing autism support for those suffering with autism that would like to live independently. It is important for everyone to understand how these independent living schemes work and the importance of such initiatives. This includes people who have no direct contact with a person that suffers from a disability. This article discusses some of the ways that individuals are helped to live independently despite personal problems with health. How a Home can be Adapted for Independent Living Many people who would like to live independently may need their home to be adapted in order to ...

Intake of low fat recipes is one of the effective methods by which you can lose weight. In other words doctors prescribe and recommend the intake of low fat recipes for successful weight loss. There is a growing demand for low fat recipes across the globe thanks to their effectiveness in causing calorie burn. Some of the very popular low fat recipes include fat free hot dogs, low fat turkey chili, healthy burritos, broccoli rice, butternut squash soup, low fat hand tossed pizza, Romanian potato soup and tuna salad. It is important to know that although not all types of pizzas are fat free, you can ask for low fat hand tossed pizza in the pizza shop in your area. This particular type of pizza is low on fat count and hence you would be immensely benefited by its intake when it comes to weight loss. Make sure that you pick only the types of fish that contribute to weight loss especially due to their low fat content. Tuna is one such fish which successfully assists in weight loss. It is...

The main features of the human eye     This image is a simplified diagram of the human eye.      In many respects it is similar to the camera . An image is formed by the eye lens on the sensitive retina at the back of the eye, whence a message is transmitted to the brain by way of the optic nerve . The iris the colored membranous disk,with a pupil in the center. It has two types of muscular fibers: circular and radial . In the bright light   the circular fibers contract and the radial fibers relax : the pupil becomes less in size to reduce the amount of light that enters. in the less light the circular muscles relax, and the radial ones contract. The pupil then becomes wider so that more light will enter to facilitate vision. in other words, the colored portion of the eye automatically adjusts the size of the pupil or circular opening in its center according to the intensity of the light falling on it. Focusing of the image...

cc licensed flickr photo shared by Robert Couse-Baker In any given year, 25% of adults will be diagnosed with a mental health condition. What follows are the most common mental health problems Americans face. Phobias About 2.2% of phobia sufferers are diagnosed with agoraphobia, the fear of open spaces. This fear causes panic when a person feels crowded or thinks they will be unable to find a place to escape should they be trapped. Another 4.4% are diagnosed with a specific phobia, such as fear of heights. These fears produce sweating, rapid heart rate and panic when confronted by the fear. Finally, 3.7% of people are found to have social anxiety. This condition surfaces when the person has to interact socially with others. Saying the wrong thing on a regular basis, being unsure of how to approach someone in conversation and feeling like a misfit can also be signs of a social phobia. Attention Deficit Hyperactivity Disorder Once thought to only affect children, ADHD is presenting...

Whenever we choose any type of course either it be certification or regular, it is important that we should have the full detailed knowledge about the course. There are different ways in looking at this matter and it is important that you should know how to choose a career before making your career decision. Choosing for a career in CNA is not so easy, but if you have the determination, you can easily clear the examination and become a certified nursing assistant. CNA programs are available online as well as offline. Both the courses follow the same procedure, but the difference is the mode. In the online CNA program, you need to download the study material and the other data as per your requirements. It also provides the facility of video conferencing. The offline mode offers classroom teaching with the regular routine process. The advantages of choosing a career as a CNA over other medical jobs includes fast growing career, no prerequisite and a short training session. There...

   This is the second part of our discussion about dispersion and color . And we’ll learn about: 1- Color of objects in white light. 2- Light filters. 3- Appearance of colored objects in colored light. 4- Primary and secondary colors. 5- Mixture of colored lights. 6- Mixing colored pigments. and 7- Infrared and ultraviolet light. So let’s begin our course! . Mixing colored lights explained 1- Color of objects in white light When white light falls on any particular body, then either all the colors in white light may be reflected from the body, when it appears white, or only some of them may be reflected while the others are absorbed. In the latter case the body appears colored. The energy of light absorbed is generally converted into internal energy (for more details about internal energy, read work, energy and power part 2 ) so that the body becomes slightly warmer . The color which the body presents to the eye is the the color of light which it reflec...

   It had been known for centuries that small fragments of colorless glass and precious stones glittered in bright colors when white light passed through them, but it was NOT until the middle of the seventeenth century that Sir Isaac Newton investigated the problem systematically. Newton's work on this subject arose out of the need for finding a way of removing coloration from the images seen through a telescope. At that time this instrument had recently been invented by a Dutch spectacle-maker named Hans Lippershey . Newton's experiment with a prism Newton began his experiments by making a small hole in one of the window shutters of his room at Cambridge. Light from the sun streamed through this hole and made a circular white patch on the opposite wall. On placing a triangular glass prism before the hole, an elongated colored patch of light was formed on the wall. Newton called this a spectrum , and noted that the colors formed were in the order Red, Orange, Yello...

Electromagnetic waves   When the wave theory of light first gained general acceptance it was considered that light waves were conveyed through a transparent elastic medium which filled the whole of space, even a vacuum. This substance was called the ether . Michael Faraday's move   A further step forward was made in 1845, when Michael Faraday showed that, under certain conditions, light was passing through a material medium were affected by a magnetic field. Now by that time, it was known that there was an inseparable connection between magnetism and electricity. Faraday's experiment gave a strong hint that light might well have electrical properties . It is James Clerk Maxwell's move   Some years later, the eminent mathematician and physicist, James Clerk Maxwell , became very interested in Faraday's work on electricity and eventually put forward a mathematical theory suggesting that an oscillating electric current should be capable of radiating ener...

Strong evidence for the wave theory of light    First, we need to know:   Interference   When two ball-ended dippers are attatched to the vibrator of the ripple tank, two sets of circular ripples are sent out which pass through one another as shown in the image.   Where the two waves are superposed in the same phase, e.g., crest on crest, we get lines of increased disturbance or constructive interference . These are called the anti-nodal lines. In between these are the nodal lines along which the waves are exactly out of phase, e.g., the crests of one are superposed on the troughs of the other. Here, provided the amplitudes of the two waves are the same, we now get zero resultant disturbance of the water surface, or destructive interference .   A similar interference pattern is obtained if either a straight or a circular wave is incident on a vertical barrier having two small apertures. In this case, interference takes place between ...

    Before various materials are used in the construction of machinery and buildings, tests are accomplished to ensure that they are able safely to stand up to the stresses to which they are likely to be subjected. Industrial laboratories have special apparatus for carrying out these tests.        Brittle substances such as masonry and cast iron will support large weights or forces of compression, but will easily break if stretching ‘tensile’ forces are applied. Where tensile forces are involved an elastic material such as steel is used. Definition of Elasticity :        Elasticity is the ability of a substance to recover its original shape and size after distortion . Robert Hooke’s law        During the time London was being rebuilt after the great fire of 1666  a great deal of research went on in connection with building construction and the strength of materials. ...