Advertisements
Advertisements
Question
An e.m. wave exerts pressure on the surface on which it is incident. Justify.
Advertisements
Solution
An e.m. wave carries momentum with itself and is given by
P = `"Energy of wave (U)"/"Speed of the wave (c)"`
= `"U"/"c"`
when it is incident upon a surface it exerts pressure on it.
APPEARS IN
RELATED QUESTIONS
Use the formula λm T= 0.29 cm K to obtain the characteristic temperature ranges for different parts of the electromagnetic spectrum. What do the numbers that you obtain tell you?
If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?
Which radiation is used for satellite communication?
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm Calculate the velocity of the wave.
Can X-rays be polarised?
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 radiations in Infrared radiation.
If the Earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
The area to be covered for T.V telecast is doubled then the height of transmitting antenna (T.V tower) will have to be:-
Why does microwave oven heats up a food item containing water molecules most efficiently?
