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QPage 363: Q8: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Page 363: Q8 Solution: It is found that yellow light does not eject photoelectrons…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often assume orange light has a higher frequency than yellow because of everyday colour hierarchy, leading them to pick orange instead of green. Remember that in the visible spectrum frequency increases from red → orange → yellow → green → blue → violet; thus orange has a lower frequency than yellow, while green has a higher frequency and is the correct choice to test against the metal's threshold frequency.

It is found that yellow light does not eject photoelectrons from a metal. Is it advisable to try with orange light or with green light?

Step-by-Step Verified Solution

**Answer:** It is advisable to try with green light. **Step-by-Step Explanation:** Yellow light does not eject photoelectrons, which means its frequency is less than the threshold frequency of the metal. Orange light has an even lower frequency than yellow light, so it will also not eject photoelectrons. Green light has a higher frequency than yellow light, so it may be able to eject photoelectrons if its frequency exceeds the threshold frequency.

All Questions in this Chapter

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