In a dark room of photography,generally red l | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Photographic films and papers are coated with silver halides,which are highly sensitive to blue and ultraviolet light but have very low sensitivit

Vedclass · Accepted Answer

$(a)$ and $(b)$ both

Vedclass · Answer

(C) Photographic films and papers are coated with silver halides,which are highly sensitive to blue and ultraviolet light but have very low sensitivity to red light. Since the energy of a photon is given by $E = hv$,where $h$ is Planck's constant and $v$ is the frequency,red light has a lower frequency compared to blue or white light. Consequently,the energy of red light photons is insufficient to trigger the chemical reaction in the light-sensitive emulsion of the film. Therefore,using red light allows photographers to work in the darkroom without exposing or ruining the photographic material.

In a dark room of photography,generally red light is used. The reason is

Similar Questions

From the photoelectric effect experiment,select the correct statement.

The curves $(1)$,$(2)$,$(3)$,and $(4)$ show the variation between the applied potential difference $(V)$ and the photoelectric current $(i)$ at two different intensities of light $(I_1 > I_2)$. In which figure is the correct variation shown?

Assertion: The photoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.
Reason: The work function of the metal is its characteristic property.

Photoelectric effect occurs when ultraviolet rays are incident on a metal plate. It does not occur when which of the following are incident?

Vedclass Test Series

Exam Paper Generator

Online Exam Module