MCQ
Laser is/are
  • A
    Highly coherent
  • B
    Highly monochromatic
  • C
    Highly directional
  • All of these

Answer

Correct option: D.
All of these
d
(d)

All the above facts are true for a laser.

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

A current of $1.5\, {A}$ is flowing through a triangle, of side $9\, {cm}$ each. The magnetic field at the centroid of the triangle is

(Assume that the current is flowing in the clockwise direction.)

Three identical capacitors are combined differently. For the same voltage to each combination, the one that stores the greatest energy is
A microscope is used with sodium light and its resolving power is not sufficiently large. Higher resolution will be obtained by using wavelength of:
A wire of length $314\,cm$ carrying current of $14\,A$ is bent to form a circle. The magnetic moment of the coil is $........A- m ^{2}$. [Given $\left.\pi=3.14\right]$
Electrostatic potential energy of given system will be
A moving coil galvanometer has $150$ equal divisions. Its current sensitivity is $10$ divisions per milliampere and voltage sensitivity is $2$ divisions per millivolt. In order that each division reads $1\, volt$, the resistance in $ohms$ needed to be connected in series with the coil will be
Two infinitely long parallel wires carry equal current in same direction. The magnetic field at a mid point in between the two wires is
A transformer with turns ratio $\frac{ N _{1}}{ N _{2}}=\frac{50}{1}$ is connected to a $120$ volt $AC$ supply. If primary and secondary circuit resistances are $1.5\, k \Omega$ and $1\, \Omega$ respectively then find out power out put (in $W$)
Two points $P$ and $Q$ are maintained at the potentials of $10\, V$ and $-4\,V$, respectively. The work done in moving $100$ electrons from $P$ and $Q$ is
The magnetic flux through a coil perpendicular to its plane and directed into paper is varying according to the relation $\phi = (2t^2 + 4t + 6)\, m\,Wb$. The $emf$ induced in the loop at $t = 4\, s$ is.......$V$