Dual Nature of Matter and Radiation MCQs for NEET — Physics Questions with Answers

In the phenomenon of seeing an object by our eye, the gathering and focussing mechanism of light by the eye-lens is best described by the:

The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are $2.14\ \text{eV}$, $2.30\ \text{eV}$ and $2.75\ \text{eV}$ respectively. If incident electromagnetic radiation has an incident energy of $2.20\ \text{eV}$, which of these photosensitive surfaces may emit photoelectrons?

The graph which shows the variation of $\left(\dfrac{1}{\lambda^2}\right)$ and its kinetic energy, $E$ is (where $\lambda$ is de Broglie wavelength of a free particle):

If $c$ is the velocity of light in free space, the correct statements about photon among the following are:

A. The energy of a photon is $E = h\nu$.

B. The velocity of a photon is $c$.

C. The momentum of a photon, $p = \dfrac{h\nu}{c}$.

D. In a photon-electron collision, both total energy and total momentum are conserved.

E. Photon possesses positive charge.

Choose the correct answer from the options given below:

A photon and an electron (mass $m$) have the same energy $E$. The ratio $(\lambda_{\text{photon}}/\lambda_{\text{electron}})$ of their de Broglie wavelengths is: ($c$ is the speed of light)

Which of the following options represent the variation of photoelectric current with property of light shown on the x-axis?