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प्रश्न
Name any two electromagnetic waves which have a frequency higher than that of violet light. State one use of each.
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उत्तर
The two electromagnetic waves and their uses having a frequency higher than that of violet light is:
X-rays: X-rays are very extensively used for medical purposes, e.g., in surgery to detect bone fractures by studying X-rays photographs.
Gamma rays: Gamma radiations are used in the cure of cancer.
संबंधित प्रश्न
Why are microwaves considered suitable for radar systems used in aircraft navigation?
What physical quantity is the same for X-rays of wavelength 10−10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500 m?
Give one use of gamma rays.
Can X-rays be used for photoelectric effect?
X-ray and visible light travel at the same speed in vacuum. Do they travel at the same speed in glass?
Is it possible that in a Coolidge tube characteristic Lα X-rays are emitted but not Kα X-rays?
Can Lα X-ray of one material have shorter wavelength than Kα X-ray of another?
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.
Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave radiations.
Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation.
What happens when an electron collides with a positron?
