Advertisements
Advertisements
प्रश्न
Name any two electromagnetic waves which have a frequency higher than that of violet light. State one use of each.
Advertisements
उत्तर
The two electromagnetic waves and their uses having a frequency higher than that of violet light is:
X-rays: X-rays are very extensively used for medical purposes, e.g., in surgery to detect bone fractures by studying X-rays photographs.
Gamma rays: Gamma radiations are used in the cure of cancer.
APPEARS IN
संबंधित प्रश्न
The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula E = hv (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?
Consider a photon of a continuous X-ray coming from a Coolidge tube. Its energy comes from
The Kα and Kβ X-rays of molybdenum have wavelengths 0.71 A and 0.63 A respectively. Find the wavelength of Lα X-ray of molybdenum.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the radiation which can be detected by thermopile.
Answer briefly.
Why high-frequency carrier waves are used for the transmission of audio signals?
Calculate the wavelength of a microwave of a frequency of 8.0 GHz.
A bat moving at 10 ms−1 towards a wall sends a sound signal of 8000 Hz towards it. On reflection, it hears a sound of frequency f The value of f in Hz is close to (speed of sound = 320 ms−1)
If λv, λx and λm Am represents the wavelength of visible light, x-ray and microwaves respectively, then ______.
What happens when an electron collides with a positron?
