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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
- For a series L-C-R circuit, the rms values of voltage across various components
- An object is placed at a distance of 10 cm from a co-axial combination of two lenses
- A thermocouple of negligible resistance produces an e.m.f. of 40 µV/⁰C in the linear range
- The voltage of clouds is 4×10⁶ volt with respect to ground. In a lightening
- The electric resistance of a certain wire of iron is R. If its length and radius
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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