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प्रश्न
State the speed of light in (a) air, (b) water, and (c) glass
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उत्तर
Speed of light in
Air - 3 × 108 ms-1 or 300000 km/h
Water - 2.25 × 108 ms-1
Glass - 2 × 108 ms-1
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संबंधित प्रश्न
A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analyzing the ray diagrams, which one of the following conclusions is he likely to draw?
(A) The emergent ray is parallel to the incident ray.
(B) The emergent ray bends at an angle to the direction of the incident ray.
(C) The emergent ray and the refracted ray are at right angles to each other.
(D) The emergent ray is perpendicular to the incident ray.
Why do the component colours of incident white light split into a spectrum while passing through a glass prism, explain
In the formation of spectrum of white light by a prism:
which colour is deviated most?
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
If white light is used in same way what change is expected in the emergent beam?
An object AB is placed in front of a convex lens as shown in fig. 4. Complete the ray diagram and obtain the image formed and state the nature of the image.
During dispersion of white light by prism placed in air, for a particular value of angle of prism,
State True or False:
"Wavelength of red light is close to 700 nm.”
