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प्रश्न
State two uses of ultraviolet radiation.
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उत्तर
(i) In producing vitamin D in plants.
(ii) For sterilizing purposes.
संबंधित प्रश्न
Describe an activity to show that colours of white light splitted by a glass prism can be recombined to get white light by another identical glass prism. Also draw ray diagram to show the recombination of the spectrum of white light.
Why do the component colours of incident white light split into a spectrum while passing through a glass prism, explain
When white light passes through a prism, it ............
A ray of white light falls on a prism. Draw a ray diagram to show that the prism disperses the white light.
Explain briefly, with the help of a neat labelled diagram, how white light gets dispersed by a prism. On which surface of a prism, there is both dispersion and deviation of light, and on which surface of the prism, there is only deviation of light ?
In the following diagram, the correctly marked angles are
(A) All
(B) Only ∠i and ∠A
(C) ∠i, ∠r and ∠A
(D) ∠i, ∠A and ∠D
In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray
(a) is parallel to the incident ray.
(b) is along the same direction of incident ray.
(c) gets deviated and bends towards the thinner part of the prism.
(d) gets deviated and bends towards the thicker part (base) of the prism.
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
What is dispersion? Explain in detail.
