Question
Compton effect shows that
|
(a) X-rays are waves |
(b) X-rays have high energy |
|
(c) X-rays can penetrate matter |
(d) Photons have momentum |
✓
Answer
(d) Photons have momentum
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
Which of the following statements about the behaviour of light is not correct?
Main source of electromagnetic waves is:
The power loss is less in transmission lines, when:
An electron is projected along the axis of a circular conductor carrying some current. Electron will experience force
|
(a) Along the axis |
(b) Perpendicular to the axis |
|
(c) At an angle of 4o with axis |
(d) No force experienced |
The ratio of the kinetic energy to the total energy of an electron in a Bohr orbit is
|
(a) – 1 |
(b) 2 |
(c) 1 : 2 |
(d) None of these |
Which of the following logic gates is an universal gate?
The momentum of a photon in an X-ray beam of 
metre wavelength is
|
(a) 1.5 |
(b) 6.6 |
|
(c) 6.6 |
(d) 2.5 |
A transformer is employed to reduce 220 V to 11 V. The primary draws a current of 5 A and the secondary 90 A. The efficiency of the transformer is
|
(a) 20% |
(b) 40% |
(c) 70% |
(d) 90% |
A lamp rated at 100 cd hangs over the middle of a round table with diameter 3 m at a height of 2 m. It is replaced by a lamp of 25 cd and the distance to the table is changed so that the illumination at the centre of the table remains as before. The illumination at edge of the table becomes X times the original. Then X is
|
(a) |
(b) |
(c) |
(d) |
Which instrument is used as the null detector in the Wheatstone bridge?