A luminous object O is located at the bottom of a big pool of liquid of refractive index `mu` and depth h. The object O emits rays upwards in all dire

Monjur Alahi

A luminous object O is located at the bottom of a big pool of liquid of refractive index `mu` and depth h. The object O emits rays upwards in all directions, so that a circle of light is formed at the surface of the liquid by the rays which are refracted into the air. what happens to the rays beyond the circle ? Determine the radius and the area of the circle .


0 like 0 dislike
3 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

Correct Answer - Rays beyond the circle are totally reflected into the liquid, Radius `=(h)/(sqrt(mu^(2)-1))` Area `=(pi h^(2))/(mu^(2)-1)`

0 like 0 dislike
3 views
Talk Doctor Online in Bissoy App
The atmosphere of earth extends upto height H and its refractive index varies with depth y from the top as `mu = 1 + (y)/(H)` . Calculate the apparent

Correct Answer - Hln2

2 Answers 1 views
Iron emits `K_alpha` X-ray of energy 6.4 keV and Calcium emits `K_alpha` X-ray of energy 3.69 keV. Calculate the times taken by an iron `K_a` photon a

Correct Answer - [10 us by both]

2 Answers 1 views
A prism of angle `60^(@)` is made of glass of refractive index 1.50 for red and 1.56 for violet. Find the angular separation of these rays when a narr

Correct Answer - `5^(@)22`

2 Answers 1 views
A point source of light `S` is placed at the bottom of a vessel containing a liquid of refractive index `5//3`. A person is viewing the source from ab

Correct Answer - 1.33 cm

2 Answers 1 views
A 60W lamp is rated at 0.8 watt/candela. Calculate (i) luminous intensity of the lamp, (ii) luminous flux of the lamp, and (iii) illuminance at a dist

Correct Answer - 75 cd, 942.8 ml, 3 lux

2 Answers 1 views
Calculate the index of refraction of a liquid from the following into glass: (a) Reading for the bottom of an empty beaker: 11.324 cm (b) Reading for

Correct Answer - 1.437

2 Answers 3 views
While determining the refractive index of a liquid experimentally, the microscope was focussed at the bottom of a beaker, when its reading was 3.965 c

Correct Answer - 1.321

2 Answers 1 views
A convex lens of refractive index 1.5 is immersed in a liquid of refractive index (i) 1.6 (ii) 1.3 and (iii) 1.5. what changes happens to the focal le

Correct Answer - (i) - 8f (ii) `+3.25f` (iii) `oo`

2 Answers 1 views
A concave lens is placed in the path of convergent rays. The rays are focussed on the axis 15 cm behind the lens. Where would these rays have been foc

Correct Answer - At a distance of 10 cm behind the lens

2 Answers 1 views
The inner dimensions of a swimming pool are `50ftxx20ftxx10ft`. The inner sides and the floor of the swimming pool have to be fixed with tiles of size

Correct Answer - Rs. 9000

2 Answers 1 views
X