Advertisements
Advertisements
प्रश्न
Give one use of gamma rays.
Advertisements
उत्तर
Gamma rays are used in medical science to kill cancer cells.
APPEARS IN
संबंधित प्रश्न
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
State Moseley's law
The Kα X-rays of aluminium (Z = 13) and zinc (Z = 30) have wavelengths 887 pm and 146 pm respectively. Use Moseley's law √v = a(Z − b) to find the wavelengths of the Kα X-ray of iron (Z = 26).
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name two sources of infrared radiation.
Answer briefly.
Why are microwaves used in radar?
Answer briefly.
Why light waves travel in a vacuum whereas sound waves cannot?
Answer briefly.
What are radio waves?
A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has a frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units, will be:
Write two uses of the following radiation.
X-rays
Which one of the following electromagnetic radiation has the least wavelength?
