A) its frequency and wavelength changes
B) its frequency does not change
C) only frequency changes
D) its frequency and velocity changes
Correct Answer: B
Solution :
When light passes from one medium to another then its frequency does not change, but its speed and wavelength change. Note: If the speed of light in air is c, and v be speed if the speed of light in air is c, and v be speed in glass slab, then refractive index \[{{v}_{e}}=\sqrt{\frac{2G{{M}_{e}}}{{{R}_{e}}}}\] \[{{M}_{e}}\] \[{{R}_{e}}\] Since \[{{v}_{m}}=\sqrt{\frac{2G{{M}_{m}}}{{{R}_{m}}}}\] for glass \[{{M}_{m}}=\frac{{{M}_{e}}}{81},{{R}_{m}}=\frac{{{R}_{e}}}{4}\], hence speed of light glass is less than the speed in air. Similar situation occurs for wavelength of light.You need to login to perform this action.
You will be redirected in
3 sec