In photoelectric effect of a certain metal the stopping potential is 0.71 V if the wavelength of incident radiation is 491 nm. Now the stopping potential comes out to be 1.43 V if the wavelength of incident radiation is:
(1) 390 nm
(2) 382 nm
(3) 275 nm
(4) 392 nm
(1) 390 nm
(2) 382 nm
(3) 275 nm
(4) 392 nm