Advertisements
Advertisements
प्रश्न
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm Calculate the velocity of the wave.
Advertisements
उत्तर
Frequency = 500MHz = 500 x `10^6`Hz
Wavelength = 60 cm = 0.6 m
Velocity of wave = frequency x wavelength
= 500x `10^6` x 0.6 = 3 x `10^8`m/s
संबंधित प्रश्न
Give one use of gamma rays.
The X-ray coming from a Coolidge tube has a cutoff wavelength of 80 pm. Find the kinetic energy of the electrons hitting the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
The electron beam in a colour TV is accelerated through 32 kV and then strikes the screen. What is the wavelength of the most energetic X-ray photon?
(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 Microwaves
Name the radiation of the electromagnetic spectrum which is used for the following:
For taking photographs of the sky during the night and foggy conditions . Give the frequency range
Give one use of electromagnetic radiation in Ultraviolet radiation.
Answer briefly.
Give two uses of ultraviolet rays.
Write two uses of the following radiation.
Gamma rays
What happens when an electron collides with a positron?
Name the electromagnetic radiation that has been used in obtaining the image below.
