Advertisements
Advertisements
Question
Does the depth of a tank of water appear to change or remain the same when viewed normally from above?
Advertisements
Solution
Depth of the tank remains the same when viewed normally from above.
RELATED QUESTIONS
Fill in the blanks to complete the following sentence
When light travels from a denser to a rarer medium, its speed ……………….
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.
The refractive index of glass is 1.5. From a point P inside a glass block, draw rays PA, PB and PC incident on the glass air surface at an angle of incidence 30°, 42° and 60° respectively.
- In the diagram show the approximate direction of these rays as they emerge out of the block.
- What is the angle of refraction for the ray PB?
`("Take" sin 42° =2/3)`
What is the correct reason for blinking / flickering of stars? Explain it.
a) The blasts in the stars.
b) Absorption of star light by the atmosphere.
c) Motion of the stars.
d) Changing refractive index of gases in the atmosphere.
Make the correct for each of the following :
With reference to the fig, the refractive index of the glass block is

In an experiment of finding the refractive index of glass, if blue light is replaced by the red light, how will the refractive index of glass change? Give reason in support of your answer.
During sunset and sunrise, the sun is seen when it is slightly below the horizon. Give reason.
State the factors on which the angle of deviation depends.
Can the absolute refractive index of a medium be less than one?
How will you verify the laws of refraction or how the refractive index of glass is determined in the laboratory?
