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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 function = W₀
Wavelength = λ₀ = 12375 eV Å/ 2.3 eV = 5380 Å
Therefore, λ₀ = 5380 Å
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Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The length of an elastic string is a metre when the longitudinal tension is 4N and b
- A solid sphere of mass M, radius R and having moment of inertia about an axis passing
- A force of 5 N is acting on an object. Displacement of object is 10 m and the work done
- The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance
- The time period of a simple pendulum in a lift descending with constant acceleration g is
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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