Advertisements
Advertisements
Question
State two uses of ultraviolet radiation.
Advertisements
Solution
(i) In producing vitamin D in plants.
(ii) For sterilizing purposes.
RELATED QUESTIONS
Draw a ray diagram to explain the term angle of deviation.
When a beam of white light is passed through a prism, it splits to form lights of seven colours. Is it possible to recombine the lights of seven colours to obtain the white light again? Explain your answer.
Describe how you could demonstrate that white light is composed of a number of colours.
The colour of white light which suffers the maximum bending (or maximum refraction) on passing through a glass prism is:
(a) yellow
(b) orange
(c) red
(d) violet
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 which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.
Which characteristic property of light is responsible for the blue colour of the sky?
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
The splitting of white light in to seven colors is called ______.
