Question
Huygens principle of secondary waves:

Answer

  1. Is a geometrical method to find, the position of a wave front.
Explanation:
Huygens's Principle states that every point on a wavefront is a source of secondary wavelets, which spread forward at the same speed.
Thus is enables to find the position of wavefront.

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 magnetic needle lying parallel to a magnetic field requires $W$ units of work to turn it through $60^{\circ}.$ The torque required to maintain the needle in this position will be
Relation between radius of Bohr's orbit ' $r$ ', integer ' $n$ ' and constant K :
In an intrinsic semiconductor, if $Ne​$ is the number of electrons in the conduction band and $Np$​ is the number of holes in the valence band then.
A resistance $R$ is to be measured using a meter bridge. Student chooses the standard resistance $S$ to be $100\Omega.$ He finds the null point at $l_1 = 2.9\ cm.$ He is told to attempt to improve the accuracy. Which of the following is a useful way?
Force between the two parallel wires carrying currents has been used to define:
In which of the following decays the element does not change?
  1. $\alpha-\text{decay}$
  2. $\beta^+-\text{decay}$
  3. $\beta^--\text{decay}$
  4. $\gamma-\text{decay}$
The torque on a bar magnet due to the earth's magnetic field is maximum when the axis of the magnet is
Assertion :   A transformer cannot work on dc supply.
Reason     : dc changes neither in magnitude nor in direction.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
 
 
 
 
In hydrogen atom, the electron is making $6.6 \times 10^{15}\ \text{rev /sec}$  around the nucleus in an orbit of radius $0.528 \mathring A .$ The magnetic moment $\left(A-m^2\right)$  will be
In a cyclotron, the angular frequency of a charged particle is independent of(a) Mass (b) Speed(c) Charge(d) Magnetic field