A certain metallic surface is illuminated by monochromatic radiation of wavelength $\lambda$. The stopping potential for photoelectric current for this radiation is 3   V 0 . If the same surface is illuminated with a radiation of wavelength 2 λ , the stopping potential is V 0 . The…

Question

A certain metallic surface is illuminated by monochromatic radiation of wavelength $\lambda$. The stopping potential for photoelectric current for this radiation is 3 &#160; V 0 . If the same surface is illuminated with a radiation of wavelength 2 &#955; , the stopping potential is V 0 . The threshold wavelength of this surface for photoelectric effect is___________ &#955; .

Aicharya · Accepted Answer

KE = h c &#955; - &#981; h c e 3 V 0 = h c &#955; 0 - &#981; &#160; &#160; &#8230; i e V 0 = h c 2 &#955; 0 - &#981; &#160; &#160; &#8230; ii Using i &#160;and &#160; ii , &#981; = h c 4 &#955; 0 = h c &#955; t &#955; t = 4 &#955; 0

A certain metallic surface is illuminated by monochromatic radiation of wavelength $\lambda$. The stopping…

Solution