Advertisements
Advertisements
Question
A Water pond appears to be 2.7 m deep. If the refractive index of water is 4/3, find the actual depth of the pond.
Solution
Apparent depth = 2.7 m
`µw=4/3`
Real depth = apparent depth × 𝛍w
`=2.7xx4/3=3.6 m`
APPEARS IN
RELATED QUESTIONS
When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it …………….
(a) bends towards normal
(b) bends away from normal
(c) passes unbent
(d) passes in zigzag way
Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum.
How must light travel out of a substance if it is not going to be refracted?
A ray of light falls normally on the surface of a transparent glass slab. Draw a ray diagram to show its path and also mark angle of incidence and angle of emergence.
-
- the angle of refraction and
- the angle of deviation for the ray?
Fig. shows a ray of white light that passes through a prism and produces a spectrum.
(a) Name the phenomenon that is taking place.
(b) What colour would you see at X and Y?
(c) What radiation would you detect above X and below Y?
State the relation between the refractive index μ and the velocity of light (vm) in that medium.
In what condition a prism is said to be in the position of minimum deviation? What is the direction of the refracted ray inside the prism in this condition?
The diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
What is the angular, deviation of the emergent ray from the glass block with respect to the incident ray?
Calculate the velocity of light in a glass block of refractive index 1.5. (Velocity of light in air = 3 × 108 m/s)