MHT CET · Physics · Dual Nature of Matter
When a light of wavelength \(300 \mathrm{~nm}\) fall on a photoelectric emitter, photo electrons are emitted. For another emitter light of wavelength \(600 \mathrm{~nm}\) is just sufficient for liberating photoelectrons. The ratio of the work function of the two emitters is
- A \(1: 2\)
- B \(2: 1\)
- C \(4: 1\)
- D \(1: 4\)
Answer & Solution
Correct Answer
(B) \(2: 1\)
Step-by-step Solution
Detailed explanation
Work function \(\phi_0=\frac{\mathrm{hc}}{\lambda_0}\)
\(
\begin{aligned}
\therefore \phi_0 & \propto \frac{1}{\lambda_0} \\
\frac{\phi_{0_1}}{\phi_{0_2}} & =\frac{\lambda_{0_2}}{\lambda_{0_1}}=\frac{600}{300}=\frac{2}{1}
\end{aligned}
\)
\(
\begin{aligned}
\therefore \phi_0 & \propto \frac{1}{\lambda_0} \\
\frac{\phi_{0_1}}{\phi_{0_2}} & =\frac{\lambda_{0_2}}{\lambda_{0_1}}=\frac{600}{300}=\frac{2}{1}
\end{aligned}
\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A particle having almost zero mass and exactly zero charge isMHT CET 2008 Easy
- A black sphere has radius R whose rate of radiation is E at temperature T. If radius is made R/2 and temperature 3T, the rate of radiation will beMHT CET 2025 Medium
- A thin uniform rod of length ' \(L\) ' and mass ' \(M\) ', is swinging freely along a horizontal axis passing through its centre. Its maximum angular speed is ' \(\omega\) '. Its centre of mass rises to a maximum height of [g= gravitational acceleration]MHT CET 2024 Hard
- A cell can be balanced against \(110 \mathrm{~cm}\) and \(100 \mathrm{~cm}\) of potentiometer wire, respectively with and without being short circuited through a resistance of \(10 \Omega\). Its internal resistance isMHT CET 2008 Medium
- The escape velocity of a satellite from the surface of earth does NOT depend onMHT CET 2025 Easy
- At constant temperature, increasing the pressure of a gas by \(5 \%\) its volume will decrease byMHT CET 2023 Hard
More PYQs from MHT CET
- In with the usual notations, if then the triangle is ….MHT CET 2019 Easy
- What is IUPAC name of the following compound?
MHT CET 2025 Medium - The value of \(\int_{0}^{\infty} \frac{x}{(1+x)\left(x^{2}+1\right)} d x\) isMHT CET 2012 Medium
- A simple microscope is used to see the object first in blue light and then in red
light. Due to the change from blue to red light, what is the effect on its magnifying
power?MHT CET 2020 Easy - The shaded region in the following figure represents the solution set for a certain linear programming problem. Then linear constraints for this region are given by
MHT CET 2023 Medium - A ray of light travels from air to water to glass and again from glass to air. Refractive index of water with respect to air is ' \(x^{\prime}\), glass with respect to water is ' \(y^{\prime}\) and air with respect to glass is 'z'. Which one of the following is correct?MHT CET 2020 Easy