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.
संबंधित प्रश्न
What is the range of the wavelength of the following electromagnetic waves?
(a) Visible.
If the potential difference applied to the tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength
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.
The distance between the cathode (filament) and the target in an X-ray tube is 1.5 m. If the cutoff wavelength is 30 pm, find the electric field between the cathode and the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the scientist who discovered Ultraviolet rays
Arrange the following electromagnetic waves in increasing order of their frequencies (i.e. begin with the lowest frequency):
Visible light, y rays, X rays, microwaves, radio waves, infrared radiations, and ultraviolet radiation.
Define the term "Intensity" in the photon picture of electromagnetic radiation.
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
Answer briefly.
Give two uses of radio waves.
Which one of the following electromagnetic radiation has the least wavelength?
