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प्रश्न
Give one use of electromagnetic radiation in Ultraviolet radiation.
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उत्तर
Ultraviolet radiation is used for sterilizing purposes.
संबंधित प्रश्न
What role dose infra-red radiation play in physical therapy?
Which radiation is used for satellite communication?
Name of physical quantity which remains same for microwaves of wavelength 1 mm and UV radiations of 1600 Å in vacuum.
Can X-rays be polarised?
One of the following wavelengths is absent and the rest are present in the X-rays coming from a Coolidge tube. Which one is the absent wavelength?
Iron emits Kα X-ray of energy 6.4 keV. Calculate the times taken by an iron Kα photon to cross through a distance of 3 km.
(Use Planck constant h = 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.
Name the two waves. compare the speeds of these waves when they travel in vacuum.
To which regions of the electromagnetic spectrum do the following wavelengths belong:
(a) 250 nm
(b) 1500 nm
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
Name the electromagnetic radiation that has been used in obtaining the image below.
