Light of wavelength λ which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that…

Question

Light of wavelength λ which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with same velocity then stopping potential will

MARKS Content Team · Accepted Answer

Correct answer: (A) increase. According to photoelectric equation hc/(λ)-ϕ=E where E=(p^2)/2m(K.E) If E is constant ⇒then 1/(λ)∝ϕ If we decrease the wavelength λ , then stopping potential ϕ will increase such that hc/(λ)-ϕ= constant

Light of wavelength $λ$ which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with same velocity then stopping potential will

Solution

Relevant Questions