MCQ
Electromagnetic radiation of highest frequency is
  • A
    Infrared radiations
  • B
    Visible radiation
  • C
    Radio waves
  • $\gamma$-rays

Answer

Correct option: D.
$\gamma$-rays
d
(d)${\nu _{\gamma - rays}} > {\nu _{{\rm{visible radiation}}}} > {\nu _{{\rm{Infrared}}}} > {\nu _{{\rm{Radio waves}}}}$

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

Whenever a hydrogen atom emits a photon in the Balmer series
5 amperes of current is passed through a metallic conductor. The charge flowing in one minute in coulombs will be
Diameter of human eye lens is $2\,mm$ . What will be the minimum distance between two points to resolve them, which are situated at a distance of $50\,meter$ from eye. The wavelength of light is $5000\;\mathring A$
A uniform beam of positively charged particles is moving with a constant velocity parallel to another beam of negatively charged particles moving with the same velocity in opposite direction separated by a distance $d.$ The variation of magnetic field $B$ along a perpendicular line draw between the two beams is best represented by
A bar magnet is oscillating in the earth's magnetic field with time period T. If its mass is increased four times then its time period will be
The capacitor of capacitance $C$ in the circuit shown is fully charged initially resistance is $R$. After the switch $S$ is closed, the time taken to reduce the stored energy in the capacitor to half its initial value is
A uniform magnetic field $B$ that is perpendicular to the plane of the page now passes through the loops, as shown. The field is confined to a region of radius $a$, where $a < b$, and is changing at a constant rate. The induced $emf$ in the wire loop of radius $b$ is $\varepsilon $. What is the induced $emf$ in the wire loop of radius $2b$ :-
A rod of length $60 \mathrm{~cm}$ rotates with a uniform angular velocity $20 \mathrm{rad} \mathrm{s}^{-1}$ about its perpendicular bisector, in a uniform magnetic field $0.5 \mathrm{~T}$. The direction of magnetic field is parallel to the axis of rotation. The potential difference between the two ends of the rod is________.$V.$
The decay constant of a radio isotope is $\lambda$. If  $A_1$ and $A_2$ are its activities at times $t_1$ and $t_2$  respectively, the number of nuclei which have decayed during the time $(t_1 - t_2)$ 
In the following circuit composed of identical resistors, across which terminals would you connect a battery in order to dissipate energy in all resistors