Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

In an experiment tungsten cathode which has a threshold wavelength $2300 Å$ is irradiated by ultraviolet light of wavelength $1800 Å$ . The maximum energy of emitted photo-electron will be

Options:

Answer:

Solution:

$K_{m a x} = h c (\frac{1}{λ} - \frac{1}{λ_{0}})$

$K_{m a x} = \frac{6.62 \times 10^{- 34} \times 3 \times 10^{8}}{1.6 \times 10^{- 19}} (\frac{10^{10}}{1800} - \frac{10^{10}}{2300})$

$K_{m a x} = 1.5 e V$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...