Q. For photoelectric emission, tungsten requires light of $2300\ \mathring{\mathrm{A}}.$ If light of $1800\ \mathring{\mathrm{A}}$ wavelength is incident then emission
A) Takes place
B) Doesn’t take place
C) May or may not take place
D) Depends on frequency
Explanation
(a) In tungsten, photoemission take place with a light of wavelength $2300\ \mathring{\mathrm{A}}.$ As emission of electron is inversely proportional to wavelength, all the wavelengths smaller then $2300\ \mathring{\mathrm{A}}$ will cause emission of electrons
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.