Advertisements
Advertisements
प्रश्न
X-ray and visible light travel at the same speed in vacuum. Do they travel at the same speed in glass?
Advertisements
उत्तर
Speed of light in any material medium is inversely proportional to the refractive index of the medium. Since refractive index of glass for X-ray is less than that for visible light, an X-ray will travel at a faster speed than visible light in glass.
APPEARS IN
संबंधित प्रश्न
Why are microwaves considered suitable for radar systems used in aircraft navigation?
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?
The small ozone layer on top of the stratosphere is crucial for human survival. Why?
Arrange the following radiations in the order of their increasing wavelength:
X-rays, infrared rays, ratio waves, gamma ray and microwaves.
Which radiation is used for satellite communication?
What is the range of the wavelength of the following electromagnetic waves?
(a) Gamma rays.
What is the range of the wavelength of the following electromagnetic waves?
(a) Ultraviolet
Name the region beyond the violet end of the spectrum called.
State the approximate range of wavelength associated with the ultraviolet rays.
Name the radiations of wavelength just longer than 8 × 10-7m.
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm.name the medium through which it is travelling
Is it possible that in a Coolidge tube characteristic Lα X-rays are emitted but not Kα X-rays?
Heat at the rate of 200 W is produced in an X-ray tube operating at 20 kV. Find the current in the circuit. Assume that only a small fraction of the kinetic energy of electrons is converted into X-rays.
Name the part of the electromagnetic spectrum which is:
Produced by bombarding a metal target with high electrons.
Name the radiations used for the detection of fracture in bones.
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
Solve the numerical problem.
Calculate the wavelength in nm of an X-ray wave of frequency 2.0 × 1018 Hz.
What is time period of the light for which the eye is most sensitive?
Write two uses of the following radiation.
Gamma rays
Name one radiation having the wavelength longer than the wavelength of these radiations.
