Question
A plane electromagnetic wave is incident on a material surface. If the wave delivers momentum p and energy E, then
| (a) p = 0, E = 0 | (b) p ¹ 0, E ¹ 0 | (c) p ¹ 0, E = 0 | (d) p = 0, E ¹ 0 |
✓
Answer
(b) p ¹ 0, E ¹ 0
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Give the SI unit of current density and its dimensional formula.
Temperature above which a ferromagnetic substance becomes paramagnetic is called
| (a) Critical temperature | (b) Boyle's temperature |
| (c) Debye's temperature | (d) Curie temperature |
A P-type semiconductor has acceptor levels 57 meV above the valence band. The maximum wavelength of light required to create a hole is (Planck’s constant h = 6.6 
J-s)
|
(a) 57 |
(b) 57 |
(c) 217100 |
(d) 11.61 |
Which of these relation holds good for an Ohmic conductor?
A ray of light is incident on a transparent glass slab of refractive index 1.62. The reflected and the refracted rays are mutually perpendicular. The angle of incidence is
|
(a) 58.3o |
(b) 50o |
(c) 35o |
(d) 30o |
A ray of light is incident at an angle of 60° on one face of a prism of angle 30°. The ray emerging out of the prism makes an angle of 30° with the incident ray. The emergent ray is
|
(a) Normal to the face through which it emerges |
|
(b) Inclined at 30° to the face through which it emerges |
|
(c) Inclined at 60° to the face through which it emerges |
|
(d) None of these |
A solenoid of inductance L carrying a certain current is linked with a total magnetic flux $\phi$. Now it is connected to a condenser with which it shares half of its initial energy. The total flux now linked with the solenoid is:
→A man can see the object between 15 cm and 30 cm. He uses the lens to see the far objects. Then due to the lens used, the near point will be at
|
(a) |
(b) 30 cm |
(c) 15 cm |
(d) |
A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is C
|
(a) Equal to 2C |
(b) Less than 2C |
(c) More than 2C |
(d) None of the above |
For the production of X-rays, the target should be made of
|
(a) Steel |
(b) Copper |
(c) Aluminum |
(d) Tungsten |