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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
- If radius of the ₁₃Al²⁷ nucleus is taken to be Rᴀı, then the radius of ₅₃Te¹²⁵ nucleus
- Two concentric spheres kept in air have radii R and r.
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- Current flows in semi-conductors through
- A flywheel rotating about a fixed axis has a kinetic energy of 360 J when
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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