Refraction of light
- Created by: cookieshypiggy
- Created on: 02-05-13 13:09
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- Refraction of light
- is
- the bending effect of light due to the change in its speed when it travels through a different optical mediums
- obeys
- Laws of refraction
- The incident ray, the reflected ray and the normal all lie on the same plane
- The ratio sin i/sin r is a contant
- i=angle of incidence r=angle of refraction
- Snell's law
- Refractive index (n)
- n=sin i / sin r
- sin i=vacuum or air, sin r=medium
- n=c/v
- c=speed in vacuum (3.0X10^8) v=speed in medium
- n=real depth / apparent depth
- n=sin i / sin r
- Critical angle and total internal refraction
- sin c=n1/n2
- c=critical angle, n1&n2 =refractive index
- total internal refraction occurs when
- light rays pass from a denser medium to a less dense medium
- angle of incidence in the denser medium is greater than the critical angle
- sin c=n1/n2
- Laws of refraction
- Applications of total internal reflection
- uses of prisms in optical instruments
- periscope and binoculars
- Use of optical fibres in telecommunic- ation and medical instruments
- uses of prisms in optical instruments
- is
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