Advertisements
Advertisements
Question
Comment on the statement ‘The refractive index of glass is 3/2.’
Advertisements
Solution
It means that the speed of light in glass is 2/3rd the speed of light in the air (or vacuum).
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
State the dependence of angle of deviation On the refractive index of the material of the prism.
Name one factor that affects the lateral displacement of light as it passes through a rectangular glass slab.
How must light travel out of a substance if it is not going to be refracted?
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)`
Why do the faces of persons sitting around campfire appear to shimmer?
Write a relation between the angle of incidence (i), angle of emergence (e), angle of the prism (A), and angle of deviation (d) for a ray of light passing through an equilateral prism.
Can the absolute refractive index of a medium be less than one?
Explain with the help of a diagram of how fish is able to see the objects above it.
The velocity of light in diamond is 121000 kms-1. What is its refractive index?
