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

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

score 3537 · Accepted Answer

Answer Key : (a) -

c < i_b

Here i_b is “brewester angle”

And c is critical angle

sin_c+sini_b

Since tan i_b= =

< sin i_b=

< 1.5

²+(1.5)²< ( 1.5)²

<

Slab =1.5

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