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प्रश्न
Give one use of gamma rays.
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उत्तर
Gamma rays are used in medical science to kill cancer cells.
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संबंधित प्रश्न
How are infrared waves produced?
Identify the part of the electromagnetic spectrum which is:
produced by bombarding a metal target by high speed electrons.
Name the region beyond the red end of the spectrum.
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.
State two properties of infrared radiations which differ from visible light.
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
X-rays, gamma rays and microwaves travelling in a vacuum have ______.
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is ______.
Write two uses of the following radiation.
X-rays
Given below in the left column are different modes of communication using the kinds of waves given in the right column.
| A. | Optical Fibre Communication |
P. | Ultrasound |
| B. | Radar | Q. | Infrared Light |
| C. | Sonar | R. | Microwaves |
| D. | Mobile Phones | S. | Radio Waves |
From the options given below, find the most appropriate match between entries in the left and the right column.
