Advertisements
Advertisements
प्रश्न
Write the following radiations in ascending order with respect to their frequencies:
X-rays, microwaves, UV rays and radio waves.
उत्तर
The given radiations can be arranged in ascending order with respect to their frequencies as:
Radio waves < Microwaves < UV rays < X-rays
APPEARS IN
संबंधित प्रश्न
Write mathematical expressions for electric and magnetic fields of an electromagnetic wave propagating along the z-axis.
In the study of a photoelectric effect the graph between the stopping potential V and frequency v of the incident radiation on two different metals P and Q is shown below:
(i) Which one of the two metals has higher threshold frequency?
(ii) Determine the work function of the metal which has greater value.
(iii) Find the maximum kinetic energy of electron emitted by light of frequency 8 × 1014 Hz for this metal.
Define frequency modulation and state any one advantage of frequency modulation (FM) over amplitude modulation (AM).
Which of the following electromagnetic radiations is used for viewing objects through fog ______.
Which of the following is false for electromagnetic waves.
Give two uses of UV radiation.
Discuss the source of electromagnetic waves.
If `vecE` and `vecB` represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of the electromagnetic wave is along ______.
The intensity of the light from a bulb incident on a surface is 0.22 W/m2 . The amplitude of the magnetic field in this light-wave is ______× 10–9 T.
(Given: Permittivity of vacuum ε0 = 8.85 × 10–12 C2 N–1 – m–2, speed of light in vacuum c = 3 × 108 ms-1)
The ratio of the magnitudes of the electric field and magnetic field of a plane electromagnetic wave is ______.