The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be
Options
(a) 5380 Å (b) 2900 Å (c) 2500 Å (d) 2000 Å
Correct Answer:
5380 Å
Explanation:
Work […]
In a photoelectric effect experiment, the slope of the graph between the stopping potential and the incident frequency will be
Options
(a) 10⁻¹⁵ (b) 10⁻³⁴ (c) 1 (d) 0.5
Correct Answer:
10⁻¹⁵
Explanation: […]
Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10⁻³ ?. The number of photons emitted, on the average, by the sources per second is […]
What is the difference between soft and hard X-ray?
Options
(a) Velocity (b) Intensity (c) Polarization (d) Frequency
Correct Answer:
Frequency
Explanation:
No explanation available. Be the first to write the explanation for […]
The name of ions knocked out from the hot surface is
Options
(a) nuclei (b) neutrons (c) electrons (d) protons
Correct Answer:
electrons
Explanation:
No explanation available. Be the first to write the […]
X-ray beam can be deflected by
Options
(a) Magnetic field (b) Electric field (c) Both (a) and (b) (d) None of these
Correct Answer:
None of these
Explanation:
No explanation available. Be the […]
The threshold frequency for a certain photosensitive metal is ν₀. When it is illuminated by light of frequency ν=2ν₀, the maximum velocity of photoelectrons is ν₀. What will be the maximum velocity of the photoelectrons […]
The de-Broglie wavelength of an electron moving with a velocity 1.5×10⁸ ms⁻¹ is equal to that of a photon. The ratio of the kinetic energy of the electron to the energy of the photon is […]
Which of the following is or the property of a cathode ray
Options
(a) It casts shadows (b) It produces heating effect (c) It produces flourescence (d) It does not deflect in electric […]
what should be the velocity of an electron so that its momentum becomes equal to that of a photon of wavelength 5200 Å?
Options
(a) 700ms⁻¹ (b) 1000ms⁻¹ (c) 1400ms⁻¹ (d) 2800ms⁻¹
Correct […]
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