MCQ
What is the path difference of destructive interference
  • A
    $nl$
  • B
    $n(\lambda + 1)$
  • C
    $\frac{(n+1) \lambda}{2}$
  • $\frac{(2 n+1) \lambda}{2}$

Answer

Correct option: D.
$\frac{(2 n+1) \lambda}{2}$
$\frac{(2 n+1) \lambda}{2}$

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

The SI unit of electrical energy is ____________?
Let the angle between two nonzero vectors $\overrightarrow{\text{A}}$ and $\overrightarrow{\text{B}}$ be 120° and its resultant be $\vec{\text{c}}:$
  1. C must be equal to $|\text{A}-\text{B}|$
  2. C must be less than $|\text{A}-\text{B}|$
  3. C must be greater than $|\text{A}-\text{B}|$
  4. C may be equal to $|\text{A}-\text{B}|$
The velocity of light is maximum is :
The angular spread of central maximum, in the diffraction pattern, does not depend on ______.
The diffusion current in a p-n junction is:
  1. From the n-side to the p-side.
  2. From the p-side to the n-side.
  3. From the n-side to the p-side if the junction is forward-biased and in the opposite direction if it is reverse-biased.
  4. From the p-side to the n-side if the junction is forward-biased and in the opposite direction if it is reverse-biased.
A resistor and a capacitor are in series across a 20V ac source. Circuit impedance is $4.33\text{k}\Omega$ Current flow in the circuit is.
A bar $-$ magnet of the pole-strength $2 Amp - m$ is kept in a magnetic field of induction $4 \times 10^{-5} Wb / m ^2$ such that the axis of the magnet makes an angle $30^{\circ}$ with the direction of the field. If the couple acting on the magnet is found to be $80 \times 10^{-7} Nm$, then the distance between the poles of the magnet is:
Magnets $A$ and $B$ are geometrically similar but the magnetic moment of $A$ is twice that of $B$. If $T_1$ and $T_2$ be the time periods of the oscillation when their like poles and unlike poles are kept together respectively, then $\frac{T_1}{T_2}$ will be 
A gas behaves more closely as an ideal gas at:
  1. Low pressure and low temperature.
  2. Low pressure and high temperature.
  3. High pressure and low temperature.
  4. High pressure and high temperature.
Energy of a charged conductor is :