EASY
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IMPORTANT
Earn 100

The electric field of a plane electromagnetic wave is given by
E→=E0i^coskzcos(ωt)
The corresponding magnetic field B→ is then given by:

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Important Questions on Electromagnetic Waves

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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 17
Radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c= Velocity of light)
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 18
The electromagnetic wave of intensity 1400 W m-2 falls on the metal surface on area 1.5 m2 is completely absorbed by it. Find out the force exerted by the beam.
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 19
A 500 W bulb is placed at the centre of a perfectly black sphere of radius R=1 m. The approximate pressure experienced by the walls of the sphere as it absorbs all the photons emitted by the bulb is (take 4π=12.6)
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 20
Which of the following are not electromagnetic waves?
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 21
Which of the following pairs of space and time varying E and B fields would generate a plane electromagnetic wave travelling in the Z -direction ?
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 22
Hertz produced electromagnetic wave by using
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 23
If λv , λx , and λm represent the wavelengths of visible light, X - rays and microwaves respectively, then
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Physics Crash Course NEET>Chapter 16 - Electromagnetic Waves>Level 1>Q 24
The electric and magnetic fields of an electromagnetic wave are