1. State Huygen’s principle in the wave theory of light. Using the principle prove laws of refection.
2. Prove laws of refraction
using Huygen’s principle .
3. Describe Michelson method to determine velocity of light.
4. Describe young’s double slit experiment and then derive the
expression W= XD/d using the path difference between the light sources S1
and S2.
5. The distance between the first and 6th bright fringe
formed in young’s double slit experiment is found to be 12.5mm. The separation between the slits 0.12 mm and
the distance of the screen from the slits is 60 cm.
Calculate the ( i) Fringe
width (ii) Wave length of
light used ( in nm)
(Fringe
width =2.5 mm, 8= 500nm )
6. In a biprism set up for
the determination of wave length of light, the slit is illuminated by a
monochromatic of light wave length 590nm.
The distance between slit and biprism is 5 cm and distance of the screen
from the biprism is 95.0cm. The fringe
width is found is be 590micro metre.
Calculate the distance between the virtual images of the slit formed by
the biprism. (d= 1mm)
7. State Brewster’s law for polarization of light.
