MCQ
Compton effect shows that
  • A
    $X-$ rays are waves
  • B
    $X-$ rays have high energy
  • C
    $X-$ rays can penetrate matter
  • Photons have momentum

Answer

Correct option: D.
Photons have momentum
d
Compton effect shows that photons gave momentum.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Consider the two idealised systems: (i) a parallel plate capacitor with large plates and small separation and (ii) a long solenoid of length L > > R, radius of cross-section. In (i), E is ideally treated as a constant between plates and zero outside. In (ii), magnetic field is constant inside the solenoid and zero outside. These idealised assumptions, however, contradict fundamental laws as below:
A solenoid is 1.0 metre long and it has 4250 turns. If a current of 5.0 ampere is flowing through it, what is the magnetic field at its centre [$\mu_0=4\pi\times 10^{-7}$weber/amp$-$m]
In $LR$ circuit the current increases to one fourth of its maximum value in $4\,sec$, then the time constant of the circuit is
Total electric flux coming out of a unit positive charge put in air is
A simple pendulum of period $T$ has a metal bob which is negatively charged. If it is allowed to oscillate above a positively charged metal plate, its period will
The half-life of radioactive Polonium $(Po)$ is $138.6$ days. For ten lakh Polonium atoms, the number of disintegrations in $24$ hours is
An infinitely long conductor $PQR$ is bent to form a right angle as shown. A current $I$ flows through $PQR$ The magnetic field due to this current at the point $M $ is $H_1$. Now another infinitely long straight conductor $QS$ is connected at $Q$ so that the current is $I/2$ in $QR$ as well as in $QS$, The current in $PQ$ remaining unchanged. The magnetic field at $M$ is now ${H_{2.}}$The ratio ${H_1}/{H_2}$ is given by
An electron having charge ‘e’ and mass ‘m’ is moving in a uniform electric field E. Its acceleration will be
The maximum efficiency of full wave rectifier is.........$\%$
In helium nucleus, there are