Advertisements
Advertisements
प्रश्न
Name two electromagnetic waves of frequency smaller than that of violet light. State one use of each.
Advertisements
उत्तर
1) Ultraviolet radiations - 100 Å to 4000 Å
Use: For detecting purity of gems, eggs, ghee, etc.
2) X-rays - 0.1 Å to 100 Å
Use: For detecting fracture in bones, teeth, etc.
संबंधित प्रश्न
Optical and radio telescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why?
Name the subjective property of light related to its wavelength.
A wave has a wavelength of 10-3 nm. Name the wave.
What do you understand by the invisible spectrum?
Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be
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.)
What are the ultraviolet rays?
The fundamental frequency of an open organ pipe is 300 Hz. The first overtone of this pipe has same frequency as first overtone of a closed organ pipe. If speed of sound is 330 m/s, then the length of closed organ pipe is:
Electromagnetic waves with wavelength
- λ1 is suitable for radar systems used in aircraft navigation.
- λ2 is used to kill germs in water purifiers.
- λ3 is used to improve visibility in runways during fog and mist conditions.
Identify and name the part of the electromagnetic spectrum to which these radiations belong. Also arrange these wavelengths in ascending order of their magnitude.
Name two electromagnetic waves of wavelength smaller than that of violet light.
