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प्रश्न
Write two uses of the following radiation.
Gamma rays
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उत्तर
- They are used in medicine to destroy cancer cells.
- The high frequency radiation is produced in nuclear reactions and also emitted by radioactive nuclei.
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संबंधित प्रश्न
Name the parts of the electromagnetic spectrum which is
used as a diagnostic tool in medicine.
Write in brief, how these waves can be produced.
Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be
Heat at the rate of 200 W is produced in an X-ray tube operating at 20 kV. Find the current in the circuit. Assume that only a small fraction of the kinetic energy of electrons is converted into X-rays.
Write the range of the wavelength of the following electromagnetic radiations:
(a) Infrared rays
(b) Ultraviolet rays
(c) γ -rays
Write one use of each of the above.
Name the scientist who discovered
X-rays
Name the scientist who discovered Visible light
Answer briefly.
Does an ordinary electric lamp emit EM waves?
All components of the electromagnetic spectrum in a vacuum have the same ______
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.
Name the electromagnetic radiation that has been used in obtaining the image below.
