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Question
State two uses of ultraviolet radiation.
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Solution
(i) In producing vitamin D in plants.
(ii) For sterilizing purposes.
RELATED QUESTIONS
In the following diagram, the path of a ray of light passing through a glass prism is shown:
In this diagram the angle of incidence, the angle of emergence and the angle of deviation respectively are (select the correct option):
(A) X, R and T
(B) Y, Q and T
(C) X, Q and P
(D) Y, Q and P
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.
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
Name the process which is involved in the formation of a rainbow.
The coloured light having the maximum speed in glass prism is:
(a) blue
(b) green
(c) violet
(d) yellow
What do you understand by the term spectrum?
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
What is the cause of the dispersion of white light through a glass prism? Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in an inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.
Write the range of wavelength of the visible spectrum.
In dispersion, the color of light that will bend more is ______.
