Slip Test - 3

           

         

            Refraction Of Light At Plane Surfaces

                                

                                            Slip Test - 3                        Marks-25

I Answer the following Questions             10 x 1/2 = 5 m

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  

A) 0    B) 45   C) 30    D) 60 

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

A) rarer to denser medium B) rarer to rarer medium 

C) denser to rarer medium D) denser to denser medium

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

A) 0    B) 20   C) 90   D) depends on the angle formed by the light ray and normal to the slab

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

A) Lateral shift B) Vertical shift C) Refractive index D) All

II Answer the following Questions            4 x 2 = 8 m

12. 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.

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

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

15. Write the laws of refraction?

III Answer the following Questions             3 x 4 = 12 m

16. Explain the formation of Mirage?

17. How do you verify experimentally that sini / sinr is a constant?

18. Explain the refraction of light through glass slab with neat diagram?

                                             All The Best