Assignment

Chapter-Light -refraction

1. What happens to the speed of light when it enters:
a. Glass from diamond
b. Air to water

2. Calculate speed of light in a given medium if the refractive index of the medium is 1.

3. Find refractive index of water.

4. Draw a labelled diagram to show:
a. Refraction through a glass slab
b. Dispersion
c. Formation of image of same size by a convex lens
d. Human eye
e. Formation of an image which cannot be obtained on screen and is small

5. Explain construction and working of a compound microscope.

6. Explain and draw diagram of an optical instrument which is used to see heavenly objects.

7. Explain construction and working of a :
a. Photographic Camera
b. Simple Microscope

8. Write function of each of the following part:
a. Pupil
b. Ciliary Muscles
c. Cornea
d. Optic Nerve

9. Differentiate between:
a. Compound Microscope and Astronomical Telescope
b. Myopia and Hypermetropia
c. Convex Lens and Concave Lens

10. Define:
a. Optical centre
b. Focal Length
c. Focus
d. Optical Density
e. Radius of Curvature