During negative β-decay
Options
(a) Neutron converts into proton (b) Proton converts into neutron (c) Neutron proton ratio increases (d) None of these
Correct Answer:
Neutron converts into proton
Explanation:
No explanation available. […]
If light emitted from sodium bulb is passed through sodium vapour, then we can get from emergent light
Options
(a) One line of 5890 Å (b) One line of 5896 Å (c) Both […]
180⁰ phase difference is obtained when light ray is reflected from
Options
(a) Air to glass (b) Glass to air (c) Diamond to glass (d) Glass to water
Correct Answer:
Air to glass
Coherent sources are those sources for which
Options
(a) Phase difference remains constant (b) Frequency remains constant (c) Both phase difference and frequency remain constant (d) None of these
Correct Answer:
Both phase […]
In Young’s experiment, the ratio of maximum to minimum intensities of the fringe system is 4:1. The amplitudes of the coherent sources are in the ratio
Options
(a) (4:1) (b) (3:1) (c) (2:1) (d) […]
Wave nature of light is verified by
Options
(a) Interference (b) Photoelectric effect (c) Reflection (d) Refraction
Correct Answer:
Interference
Explanation:
No explanation available. Be the first to write the explanation for this […]
Volume of gas becomes four times if temperature becomes
Options
(a) Four times at constant pressure (b) One fourth at constant pressure (c) Two times at constant pressure (d) Half at constant pressure
Correct […]
Depletion layer contains
Options
(a) Only immobile negative and positive ions (b) Only free charge carriers (c) Both free carriers and immobile ions (d) None of these
Correct Answer:
Only immobile negative and […]
If threshold wevelength for sodium is 6800 Å, the work function will be
Options
(a) 1.8 eV (b) 2.5 eV (c) 0.14 eV (d) 1.4 eV
Correct Answer:
1.8 eV
Explanation:
No explanation […]
Which of the following is true for number of spectral lines in going from Lyman series to Pfund series?
Options
(a) Increases (b) Decreases (c) Unchanged (d) May decrease or increase
Correct Answer: […]
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