When a metal surface is illuminated by light of wavelength …, the stopping potential is …. When the same surface is illuminated by light of wavelength …, stopping potential is …. The threshold wavelength for this surface is:

Dual Nature of Radiation

JEE Main 2024 · 31 Jan, Morning shift · Q6666

PhysicsMedium145×since 2002Q6666

When a metal surface is illuminated by light of wavelength

\lambda

, the stopping potential is

8 \mathrm{~V}

. When the same surface is illuminated by light of wavelength

3 \lambda

, stopping potential is

2 \mathrm{~V}

. The threshold wavelength for this surface is: