MCQ
Albert Einstein got a nobel prize in physics for his work on:
- ASpecial theory of relativity
- BGeneral theory of relativity
- CPhotoelectric effect
- DTheory of specific heats
✓
Answer
- Photoelectric effect
Explanation:
In 1905, Albert Einstein extended Planck's hypothesis to explain the photoelectric effect, which is the emission of electrons by a metal surface when it is irradiated by light or more-energetic photons.
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
Assertion : There is no atmosphere on moon
Reason : Escape velocity at the surface of moon is low.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
In which of the following situations, the heavier of the two particles has smaller de Broglie wavelength? The two particles:
Consider the following two statements:
- Linear momentum of the system remains constant.
- Centre of mass of the system remains at rest.
- A implies B and B implies A.
- A does not imply B and B does not imply A.
- A implies B but B does not imply A.
- B implies A but A does not imply B.
A magnet is dropped down an infinitely long vertical copper tube
|
(a) The magnet moves with continuously increasing velocity and ultimately acquires a constant terminal velocity |
|
(b) The magnet moves with continuously decreasing velocity and ultimately comes to rest |
|
(c) The magnet moves with continuously increasing velocity but constant acceleration |
|
(d) The magnet moves with continuously increasing velocity and acceleration |
A glass slab is placed in the path of beam of convergent light. The point of convergence of light:
If $\angle i=60^{\circ}$ and $\angle r=90^{\circ}$ then the refractive index ${ }_1 n_2$ will be :
→Which of the following particles will describe the smallest circle when projected with the same velocity perpendicular to a magnetic field?
- Electron
- Proton
- He+
- Li+
An object is placed at a distance of 20 cm from a convex lens of focal length 10 cm. The image is formed on the other side of the lens at a distance
|
(a) 20 cm |
(b) 10 cm |
(c) 40 cm |
(d) 30 cm |
In the set up shown, the two slits S1 and S2 are not equidistant from the slit S. The central fringe at O is then:
Crystal structure is studied by: