A plane electromagnetic wave is incident on a material surface. T… - Vidyadip

Question

A plane electromagnetic wave is incident on a material surface. The wave delivers momentum p and energy E.

$\text{p}=0,\text{ E}\neq0$
$\text{p}\neq0,\text{ E}=0$
$\text{p}\neq0,\text{ E}\neq0$
$\text{p}=0,\text{ E}=0$

✓

Answer

$\text{p}\neq0,\text{ E}\neq0$

Explanation:
When an electromagnetic wave strikes a material surface, it transports the momentum, as well as the energy, to the surface. The striking electromagnetic wave exerts pressure on the surface. The total energy transferred to the surface by the electromagnetic wave is given by $\text{E}=\text{pc}$ Therefore, $\text{p}\neq0,\text{ E}\neq0$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electromagnetic Waves→Electromagnetic Waves — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

The current is flowing in south direction along a power line. The direction of magnetic field above the power line (neglecting earth's field) is(a) South(b) East(c) North(d) West

Earth’s potential is _______?

A polariser is used to(a) Reduce intensity of light(b) Produce polarised light(c) Increase intensity of light(d) Produce unpolarised light

Bohrs atomic model assumes:

Same as problem 4 except the coil A is made to rotate about a vertical axis (Fig). No current flows in B if A is at rest. The current in coil A, when the current in B (at t = 0) is counterclockwise and the coil A is as shown at this instant, t = 0, is:

Two capacitors whose capacitances are $C _1$ and $C _2$ If they are given equal charges then the ratio of the energies stored in them will be :

An electric dipole consisting of charges +q and -q separated by a distance L is in stable equilibrium in a uniform electric field $\vec{\text{E}}.$ The electrostatic potential energy of the dipole is:

A parallel plate capacitor is first charged and then isolated, and a dielectric slab is introduced between the plates. The quantity that remains unchanged is:

A positive charge Q is uniformly distributed along a circular ring of radius R.A. small test charge q is placed at the centre of the ring Fig. Then:

Below figures $(1)$ and $(2)$ represent lines of force. Which is correct statement