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प्रश्न
Give one use of ultraviolet radiation.
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उत्तर
Ultraviolet radiations are used for detecting the purity of gems, eggs, ghee etc.
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संबंधित प्रश्न
Identify the part of the electromagnetic spectrum which is:
produced by bombarding a metal target by high speed electrons.
What is the range of the wavelength of the following electromagnetic waves?
(a) Ultraviolet
Frequencies of Kα X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency v and the atomic number Z ?
Mark the correct options.
(a) An atom with a vacancy has smaller energy that a neutral atom.
(b) K X-ray is emitted when a hole makes a jump from the K shell to some other shell.
(c) The wavelength of K X-ray is smaller than the wavelength of L X-ray of the same material.
(d) The wavelength of Kα X-ray is smaller than the wavelength of Kβ X-ray of the same material.
The Kα and Kβ X-rays of molybdenum have wavelengths 0.71 A and 0.63 A respectively. Find the wavelength of Lα X-ray of molybdenum.
State the name and the range of wavelength of the invisible electromagnetic waves beyond the red end of the visible spectrum.
Choose the correct option.
How does the frequency of a beam of ultraviolet light change when it travels from air into glass?
Answer briefly.
Can we produce a pure electric or magnetic wave in space? Why?
What happens when an electron collides with a positron?
Name two electromagnetic waves of wavelength smaller than that of violet light.
