Question

Notes on refraction of light for class 8

Answer 1

:Speed of light in air-3*100000000m/s
:speed of light in water-2.25*100000000m/s
:speed of light in glass-2*100000000m/s
: the change in direction of path of light when it passes from one transparent medium to another it is called the refraction of light.
: when the Ray of light travels from rarer medium to the denser medium it depends towards the normal
: when the Ray of light travels from a denser to the rarer medium it bends away from the normal
: Ray of light falls normally on the surface separating the to media it passes undeviated
: laws of refraction of light
1. the incident ray and the normal at the point of incidence and the refracted all lie on the same plane.
2. for a given pair of media and the given colour of light the ratio of sine of angle of incidence to the Sine of angle of refraction is a constant.
: mew- to speed of light in first medium /speed of light in second medium
: VIBGYOR-VIOLET, INDIGO ,BLUE ,GREEN YELLOW ,ORANGE AND RED .
: the splitting of white light into the different colours is call Dispersion of light.
HOPE THIS HELPS YOU!!:-))