JEE Main 202120 Jul, Evening shiftPhysicsHardDual Nature of Matter and Radiation146× since 2002
A certain metallic surface is illuminated by monochromatic radiation of wavelength . The stopping potential for photoelectric current for this radiation is 3V₀. If the same surface is illuminated with a radiation of wavelength 2, the stopping potential is V₀. The threshold wavelength of this surface for photoelectric effect is ____________ .