Advertisements
Advertisements
Question
State two uses of infrared radiations.
Solution
(i) For therapeutic purposes.
(ii) In night photography.
APPEARS IN
RELATED QUESTIONS
Optical and radio telescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why?
State an additional use of the X-rays waves
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
Can a hydrogen atom emit characteristic X-rays?
Consider a photon of a continuous X-ray coming from a Coolidge tube. Its energy comes from
What potential difference should be applied across an X-ray tube to get X-ray of wavelength not less than 0.10 nm? What is the maximum energy of a photon of this X-ray in joule?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Give one use of electromagnetic radiations in Infrared radiation.
What are the ultraviolet rays?
Calculate the wavelength of a microwave of a frequency of 8.0 GHz.
The magnetic field of a beam emerging from a filter facing a floodlight is given by B0 = 12 × 10–8 sin (1.20 × 107z – 3.60 × 1015t) T. What is the average intensity of the beam?
