The path difference between two interfering light waves meeting a… - Vidyadip

MCQ

The path difference between two interfering light waves meeting at a point on the screen is $\left(\frac{87}{2}\right) \lambda$. The band obtained at that point is

A
$87^{\text {th }}$ dark band
✓
$44^{\text {th }}$ dark band
C
$44^{\text {th }}$ bright band
D
$87^{\text {th }}$ bright band

✓

Answer

Correct option: B.

$44^{\text {th }}$ dark band

(b) : Path difference $=87\left(\frac{\lambda}{2}\right)$
For dark point, $(2 n-1) \frac{\lambda}{2}=87\left(\frac{\lambda}{2}\right)$
$
2 n-1=87 \Rightarrow 2 n=88
$
$n=44^{\text {th }}$ dark band

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

Explore more

More "M.C.Q (1 Marks)" from Wave Optics→Wave Optics — all question types→Physics STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Two S.H.Ms are represented by equations $y_1=0.1 \sin \left(100 \pi t+\frac{\pi}{3}\right)$ and $y_2=0.1 \cos (100 \pi t)$ The phase difference between the speeds of the two particles is

The open-circuit potential difference across the terminals of a cell balances on $150 cm$ of a potentiometer wire. When the cell is shunted by a $4.9 \Omega$ resistor, the balancing length reduces to $147 cm$. The internal resistance of the cell is

According to kinetic theory of gases, which one of the following statements is wrong?

The potential energy of a dipole iii a uniform electric held $\vec{E}$ is minimum when the dipole moment is

A stone of mass $1 kg$ is tied to a string $2 m$ long and is rotated at constant speed of $40 m s ^{-1}$ in a vertical circle. The ratio of the tension at the top and the bottom is [Take $g=10 m s ^{-2}$ ]

The ratio of emissive power of a perfect blackbody at 1327°C and 527°C is

A parallel beam of monochromatic light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is

A telescope has large diameter of the objective. Then its resolving power is

An organ pipe is closed at one end. The pth overtone is the….th harmonic.

In a thermodynamic process, there is no exchange of heat between the system and surroundings. Then the thermodynamic process is