Test on Refraction of light at plane surfaces

3. Refraction of Light at Plane Surfaces 

1/2 Mark Questions

1. Write Snell’s law.

2. What is the reason behind the brilliance of diamond ?

3. What is the Speed of light in vacuum ?

4. What is the critical angle of diamond ?

5. What is the reason behind the twinkling of stars ?

6. write the unit of refractive index?

7. The refractive index of glass with respect to air is 2. Then the critical angle of glass-air interface is 

8. Total internal reflection takes place when the light ray travels from

9. The angle of deviation produced by the glass slab is

10. The distance between the parallel rays in a glass slab is called

11. Relative refractive index n21 =

12. At critical angle of incidence, the angle of refraction is

13. Refractive index of a medium depends on

14. When light ray travels from denser to rarer medium, the relation between r and i is

15. A test tube is immersed at a certain angle in a tumbler of water to have a mirror surface for certain

viewing position. It is due to

1 Mark Questions

1. What is the speed of light in vacuum

2. Define “Refraction of Light”.

3. Define “Refractive index” or “Absolute Refractive index”.

4. What is “Critical angle” ?

5. Define “Total internal reflection”.

6. Define “mirage”?

7. Define snell's law.

8. Can you take a photo of a mirage?

9. Is there any chance that angle of refraction is equal to 90

10. Define relative refractive index.

2 Marks Questions

1. Why is it difficult to shoot a fish swimming in water?

2. The speed of the light in a diamond is 1,24,000 km/s. Find the refractive index of diamond if the speed of light in air is 3,00,000 km/s.

3. Refractive index of glass relative to water is 9/8. What is the refractive index of water relative to glass?

4. The refractive index of glass is 3/2. Then what is the speed of light in glass?

5. Why do stars appear twinkling?

6. Determine the refractive index of benzene if the critical angle is 42.

7. What is the reason behind the shining of diamonds and how do you appreciate it?

8. Why does a diamond shine more than a glass piece cut to the same shape?

9. When we sit at a campfire, objects beyond the fire are seen swaying. Give the reason for it.

10. On what factors does the refractive index of a medium depend?

11. Write the laws of refraction.

12. How do you appreciate the role of Fermat principle in drawing ray diagrams.