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प्रश्न
The speed of light in air or vacuum is
पर्याय
3 × 108 M s-1
2.25 × 108 m s-1
332 ms-1
2.0 × 108 ms-1
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उत्तर
3 × 108 M s-1
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संबंधित प्रश्न
Study the following diagrams in which the path of a ray of light passing through a glass prism as traced by four students P, Q, R and S is shown:
The student who has traced the path correctly is
(A) P
(B) Q
(C) R
(D) S
Draw a ray diagram to explain the term angle of deviation.
When a white light ray falls on a prism, the ray at its first surface suffers ______.
If white light is used in same way what change is expected in the emergent beam?
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
In the diagram, a narrow beam of white light is incident on a right-angled isosceles prism. The critical angle of the material of prism for the yellow colour of white light is 45°. Complete the diagram to show the path of blue, yellow, and red colours of white light till they emerge out of the prism.
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
The angle of deviation through a prism is minimum when
- Incident rays and emergent rays are symmetric to the prism.
- The refracted ray inside the prism becomes parallel to its base.
- The angle of incidence is equal to that of the angle of emergence.
- When the angle of emergence has doubled the angle of incidence.
Choose the correct answer from the options given below:
