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प्रश्न
Give one use of electromagnetic radiation in Microwaves.
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उत्तर
Microwaves are used for communication.
संबंधित प्रश्न
What role dose infra-red radiation play in maintain the Earth’s warmth
If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?
What is the range of the wavelength of the following electromagnetic waves?
(a) Infrared.
What is the range of the wavelength of the following electromagnetic waves?
(a) Micro waves .
Name two sources, each of infrared radiations and ultraviolet radiations.
The wavelengths of Kα and Lα X-rays of a material are 21.3 pm and 141 pm respectively. Find the wavelength of Kβ X-ray of the material.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Continuous X-rays are made to strike a tissue paper soaked with polluted water. The incoming X-rays excite the atoms of the sample by knocking out the electrons from the inner shells. Characteristic X-rays are analysed and the intensity is plotted against the wavelength. Assuming that only Kα intensities are detected, list the elements present in the sample from the plot. Use Moseley's equation v − (25 × 1014Hz)(Z − 1)2.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
State the name and the range of wavelength of the invisible electromagnetic waves beyond the red end of the visible spectrum.
Answer briefly.
Give two uses of radio waves.
Answer briefly.
Why high-frequency carrier waves are used for the transmission of audio signals?
