10th p.s quiz-20 (Refraction at Plane Surfaces) by PRABHAKAR

Which is more optical denser medium

• Cold air

• Hot air

• Both cold and hot air have same optical density

• Can't say

Suppose you are inside the water in a swimming pool, your friend is standing on the edge of the swimming pool. Your friend appears to be--------

• Shorter

• Taller

• Same size

• Stout

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

•  $\angle i$   =  $\angle r$  

•  $\angle i$   >  $\angle r$  

•  $\angle i$   <  $\angle r$  

• no relation between them

The formula to calculate the refractive index is

• n=cv
• n=v/c
• n=c/v
• v=nc

The velocity of light in vacuum is _______ m/s

• 3x10⁸
• 3x10¹²
• 3x10⁶
• 3x10¹⁰

Tags

NGSS.HS-PS4-1

When light ray travels from denser medium to rarer medium, the relation between  $\angle i$  and  $\angle r$   

•  $\angle i$  =  $\angle r$  

•  $\angle i$  <  $\angle r$  

•  $\angle i$  >  $\angle r$  

• no relation between them

In which medium Light has the highest velocity?

flint glass n=1.70

barium glass n=1.60

crown glass n=1.523

water n=1.33

diamond n=2.42

• diamond

• water

• flint glass

• barium glass

When light passes from one medium into another in which its speed is lower, then

• it is bent towards the normal.

• it always lies along the normal.

• it is unaffected.

• it is bent away from the normal.

Which of the following factors change during the refraction of light ?

• Frequency only

• Wavelength only

• Speed and frequency

• Wavelength and speed

When light passes from denser medium to rarer medium

• it is bent toward the normal.

• it always lies along the normal.

• it is unaffected.

• it is bent away from the normal.