Question

For photoelectric emission, tungsten requires light of $2300\stackrel{\circ }{A}$. If light of $1800\stackrel{\circ }{A}$ wavelength is incident then emission

• A. Takes place
• B. Don’t take place
• C. May or may not take place
• D. Depends on frequency

Answer 1

The correct option is A

Takes place

In tungsten, photoemission take place with a light of wavelength $2300\stackrel{\circ }{A}$. As emission of electron is inversely proportional to wavelength, all the wavelengths smaller then $2300\stackrel{\circ }{A}$ will cause emission of electrons.