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Last Updated On 23-10-2022 - By Sara

Consider a tank made of glass (reiractive index 1.5) with a thick bottom.  It is filled with a liquid of refractive index ., A student finds that, irrespective of what the incident angle i(see figure0 is for a beam of light entering the liquid, is never reflected from the liquid glass interface happen, the minimum value of  is:

a.

 

b.

 

c.

 

d.

 


Question ID - 50056 :-

Consider a tank made of glass (reiractive index 1.5) with a thick bottom.  It is filled with a liquid of refractive index ., A student finds that, irrespective of what the incident angle i(see figure0 is for a beam of light entering the liquid, is never reflected from the liquid glass interface happen, the minimum value of  is:

a.

 

b.

 

c.

 

d.

 

1 Answer
5876 Votes
3537

Answer Key : (a) -

c < ib

 Here ib is “brewester angle”

 And c is critical angle

sinc+sinib                       

Since tan ib= =

<                              sin ib=

 < 1.5

 2+(1.5)2< ( 1.5)2

 <

Slab =1.5



Next Question :

The ratio of the height of a room to its semi-perimeter is 2:5. It costs Rs. 260 to paper the walls of the room with paper 50 cm wide at Rs. 2 per m allowing an area of 15 sq. m for doors and windows. The height of the room is

(a)

2.6 m

(b)

3.9 m

(c)

4 m

(d)

4.2 m


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