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प्रश्न
Why is the ratio of the velocities of light of wavelengths 4000Å and 8000Å in vacuum 1: 1?
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उत्तर
In vacuum light or any electromagnetic wave velocity is always constant 3 × 108 m/s and it does not depend on wavelength or frequency.
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संबंधित प्रश्न
Why do we get a spectrum of seven colors when white light is dispersed by a prism?
How is the reflection of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass?
A student traces the path of a ray of white light through a rectangular glass slab and marks, the angles of incidence (∠i) , refraction (∠r) and emergence (∠e) as shown. Which angle or angles has he not marked correctly?
(A) ∠i only
(B) ∠i and ∠r
(C) ∠i and ∠e
(D) ∠r and ∠e
Four students A, B, C and D traced the paths of incident ray and the emergent ray by fixing pins P and Q for incident ray and pins R and S for emergent ray for a ray of light passing through a glass slab.
The correct emergent ray was traced by the student:
(1) A
(2) B
(3) C
(4) D
Which of the following has the highest refractive index:
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?
Express the refractive index μ of a medium in terms of the velocity of light.
Draw a diagram to show the refraction of a monochromatic light ray through an equilateral prism. On the diagram, label the incident, refracted, and emergent rays. It also indicates the angle of deviation by the letter δ.
Calculate the velocity of light in a glass block of refractive index 1.5. (Velocity of light in air = 3 × 108 m/s)
