Advertisements
Advertisements
प्रश्न
Why does the sun appear bigger during sunset or sunrise?
उत्तर
During sunset or sunrise, the rays of light from the sun travel through a long distance through air. Thus, the apparent image of the sun is formed closer to the eye, which in turn appears bigger.
APPEARS IN
संबंधित प्रश्न
Write a short note on dispersion of light.
On the basis of the experiment, "To trace the path of a ray of light through a rectangular glass slab", students of a class arrived at which one of the following conclusions?
(A) Angle of incidence is greater than the angle of emergence.
(B) Angle of emergence is smaller than the angle of refraction.
(C) Emergent ray is parallel to the refracted ray.
(D) Incident ray and emergent ray are parallel to each other.
State the dependence of angle of deviation On the refractive index of the material of the prism.
The speed of light in glass is 2 × 105 km/s. What is the refractive index of glass?
A student has traced the path of a ray of light through a glass slab as follows. If you are asked to label 1, 2, 3 and 4, the correct sequencing of labeling ∠i, ∠e, ∠r and lateral displacement respectively is
(a) 2, 1, 3, 4
(b) 1, 2, 3, 4
(c) 1, 3, 2, 4
(d) 1, 3, 4, 2
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
Draw a ray diagram showing the lateral displacement of a ray of light when it passes through a parallel sided glass slab.
How does the angle of deviation produced by a prism depend on the angle of incidence of light at the prism surface? Draw a graph to illustrate your answer.
The velocity of light in diamond is 121000 kms-1. What is its refractive index?
