Rays of Light and Happiness

Bright and happy sunlight is the most important survival factor in human life. In fact, it is light from the sun and has a speed of 186,000 miles per second and a distance of 93 million miles compared to the food, water and air support systems on the planet. (R.B.2) The sun is an indispensable element in our life and helps make our whole body function properly. "Light is as effective as a medicine, perhaps more effective," Anna Wirz-Justice of the Basle psychiatrist in Switzerland wrote. (Zhang Bolun 2) Hughes said he is an expert in neuroscience, physiology and psychology.

Let's first consider a lenticular lens. Let's say that some rays are near the lens and these rays travel parallel to the main axis. When reaching the front of the lens, each ray is refracted in the normal direction of the surface. At this boundary, light enters the denser medium (usually plastic or glass) from the air. Since light travels to the medium that propagates relatively slowly (the higher optical density) from its rapidly propagating (low optical density) medium, it bends toward the normal. This is the principle of refraction of FST. This shows the two incident rays in the figure below. When the light passes through the boundary and enters the lens, it travels linearly until it reaches the back of the lens. At this boundary, each ray refracts its normal from the surface.

Light waves propagate linearly from the light source. Since light does not turn at the corner, it hits an opaque object (so that light can not pass through) and prevents it from reaching the other side of the object. You can see a black shadow in the light blocked part. When light strikes a substance, the energy of the photon affects the atoms of the substance. In some materials such as metals, light does not pass through them because atoms absorb some photons. These materials are opaque. For other materials such as glass, atoms can not absorb photons and light passes through them. These materials are transparent