MCQ
Einstein's theory of relativity is based on:
- APhotoelectrons absorb and emit photons
- ✓The velocity of light is the same for all observers
- CMass and energy are intra- convertible
- DEnergy and momentum are conserved
✓
Answer
Correct option: B.
The velocity of light is the same for all observers
The main postulate of Einstein's special theory of relativity is that the speed of light is constant and equal to c in all the inertial frames i.e the velocity of light is same for all observers.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An electron beam passes through a magnetic field of $2 \times 10^{-3}\,Wb/m^2$ and an electric field of $1.0 \times 10^4\,V/m$ both acting simultaneously. The path of electron remains undeviated. The speed of electron if the electric field is removed, and the radius of electron path will be respectively
→Decay constant of radium is $\lambda $. By a suitable process its compound radium bromide is obtained. The decay constant of radium bromide will be
→In the circuit shown in figure, each capacitor has a capacity of 3μF. The equivalent capacity between A and B is
In Milikan’s experiment, an oil drop having charge $q$ gets stationary on applying a potential difference $V$ in between two plates separated by a distance $‘d’$. The weight of the drop is
→Let p and E denote the linear momentum and energy of a photon. If the wavelength is decreased:
A charged particle q is shot towards another charged particle Q which is fixed, with a speed v. It approaches Q upto a closest distance r and then returns. If q were given a speed 2v, the closest distances of approach would be
A magnet of magnetic moment 50 $\hat{1} \mathrm{~A}-\mathrm{m}^2$ is placed along the x-axis in a magnetic field $\vec{B}=(0.5 \hat{i}+3.0 \hat{j})$T. The torque acting on the magnet is
→Six resistors of $3 \;\Omega$ each are connected along the sides of a hexagon and three resistors of $6\; \Omega$ each are connected along $A C, A D$ and $A E$ as shown in the figure. The equivalent resistance between $A$ and $B$ is equal to
→Relation between current $I$ flowing in moving coil galyanometer and deflection $\theta$ is :
→$100$ cells each of $e.m.f.$ $5\, V$ and internal resistance $1\, ohm$ are to be arranged so as to produce maximum current in a $25\, ohms$ resistance. Each row is to contain equal number of cells. The number of rows should be
→