When a metallic surface is illuminated with radiation of wavelength `lamda`, the stopping poential is V. If the same surface is illuminated with radiation of wavelength `2lamda`, the stopping potential is `V/4`. The threshold wavelength for the metallic surface is

When a metallic surface is illuminated with radiation of wavelength lambda , the stopping potentials is V. If the same surface is illuminated with radiation of wavelength 2 lambda , the stopping potential is ( V )/( 4) . The threshold wavelength for the metallic surface is

When a metallic surface is illuminated with radiation of wavelength lambda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2 lambda , the stopping potential is (V)/(4) . The threshold wavelength surface is :

When a metallic surface is illuminated with radiation of wavelength lambda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2 lambda , the stopping potential is (V)/(4) . The threshold wavelength surface is :

When a metallic surface is illuminated with radiation of wavelength lambda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2 lambda , the stopping potential is (V)/(4) . The threshold wavelength surface is : (a) 5lambda (b) (5)/(2)lambda (c) 3lambda (d) 4lambda

When a metallic surface is illuminated with radiation of wavelength lambda ,the stopping potential is V.If the same surface is illuminated with radiation of wavelength 2 lambda ,the metallic surface is