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प्रश्न
Give any two uses of infrared waves.
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उत्तर १
For therapeutic purposes and long distance photography.
उत्तर २
- TV Remote Controls: IR LEDs are used to transmit encoded signals to electronic devices.
- Physical Therapy: IR lamps are used to treat muscular strains and provide warmth to tissues.
- Night Vision: IR sensors are used in goggles and cameras to detect heat signatures in the dark.
Notes
Students can refer to the provided solutions based on their preferred marks.
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संबंधित प्रश्न
To which part of the electromagnetic spectrum does a wave of frequency 5 × 1019 Hz belong?
What is the range of the wavelength of the following electromagnetic waves?
(a) Infrared.
Name the region beyond the red end of the spectrum.
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation,
(a) the intensity increases
(b) the minimum wavelength increases
(c) the intensity remains unchanged
(d) the minimum wavelength decreases.
Gamma rays and radio waves travel with the same velocity in free space. Distinguish between them in terms of their origin and the main application.
State two properties of infrared radiations which differ from visible light.
Which is the correct ascending order of wavelengths?
Name the electromagnetic radiation whose frequency is 10 Hz.
