Verified Solution • 2025–26 Session moderate

QPages 363-364: Q7: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Pages 363-364: Q7 Solution: Light of wavelength falls on a metal with work-function .…

Light of wavelength λ\lambda falls on a metal with work-function hc/λ0hc/\lambda_0. Photoelectric effect will take place only if

Multiple Choice Options

  • A λ≥λ0\lambda \geq \lambda_0
  • B λ≥2λ0\lambda \geq 2\lambda_0
  • C λ≤λ0\lambda \leq \lambda_0
  • D λ<λ0/2\lambda < \lambda_0/2

Step-by-Step Verified Solution

**Answer:** (c) _ � __. **Step-by-Step Explanation:** Photoelectric effect occurs when the wavelength is at most the threshold wavelength.

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