Question

When yellow light is incident on a surface, no electrons are emitted while green light can emit. If red light is incident on the surface then

• A. No electrons are emitted
• B. Photons are emitted
• C. Electrons of higher energy are emitted
• D. Electrons of lower energy are emitted

Answer 1

The correct option is A No electrons are emitted

${\lambda }_{Green}$ < ${\lambda }_{Yellow}$ < ${\lambda }_{Red}$
According to the question${\lambda }_{Green}$ is the maximum wavelength for which photoelectric emission takes place. Hence no emission takes place with red light.