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