no, the light rays are caused due to reflection,transmission and absorption of light.
Index of refraction.
Diffraction is the bending of the light rays at small aperture
Refraction.
A lens is a curved glass that refracts or bends light rays. The two principal types of lenses are convex and concave.
Whenever electromagnetic radiation of any kind (light, heat, radio, gamma rays and microwaves are all examples of electromagnetic radiation) travels from one medium to another, the radiation will be refracted because the speed of light in each medium is different. When light travels from air into glass, the glass slows the light down, and the light refracts or "bends" toward the glass, depending on the angle of incidence. (The Angle of Incidence is the angle at which the light hits the glass. ) The amount of refraction (bending) also depends on the wavelength of the radiation, so when sunlight hits the glass at an angle, the glass breaks the "white" light into a rainbow of colors. This is the same thing that happens with a real rainbow, when light hits water droplets and is refracted and broken into different colors.
Some forms of electromagnetic radiation that can pass through glass are x-rays,gamma rays,ordinary light,microwaves,infrared and radio waves.
Refraction
Refraction
The bending of light rays so they focus on the retina is called refraction.
Refraction is the bending of light rays when passing from one transparent material to another.
diffraction
Refraction.
reflection of light is when light bounces off an object, particularly a mirror (or something like that). refraction is the bending of light rays, when light rays flow through a substance (particularly curved). Ex: a straw looks at an angle when put into water, when it's really just the light rays bending.
Refraction
Refraction
REFRACTION
Refraction is the bending of light waves as they pass from one medium to another.
Diffraction is the bending of the light rays at small aperture