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. |
|
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. |
|
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
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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