In a Young’s double slit experiment, the path difference, at a ce… - Vidyadip

MCQ

In a Young’s double slit experiment, the path difference, at a certain point on the screen, between two interfering waves is $1/8^{th}$ of wavelength. The ratio of the intensity at this point to that at the centre of a bright fringe is close to

A
$0.74$
✓
$0.85$
C
$0.94$
D
$0.80$

✓

Answer

Correct option: B.

$0.85$

b
$\Delta x=\frac{\lambda}{8}$

Phase $|\Delta P|=\frac{2 \pi}{\lambda} \times \frac{\lambda}{8}=\frac{\pi}{4}$

$\therefore $ $\mathrm{I}_{\mathrm{res}}=I+I+2I \cos \left(\frac{\mathrm{R}}{4}\right)$

$=\,2I\left(1+\frac{1}{\sqrt{2}}\right)=2I \times 1.7$

$\therefore \quad \frac{I_{res }}{I_{\operatorname{man}}}=\frac{2I\times 1.7}{41}=0.85$

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 10. Wave optics→10. Wave optics — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A Zener diode, having breakdown voltage equal to $15\,\,V,$ is used in a voltage regulator circuit shown in figure. The current through the diode is......$mA$

The number of electrons to be put on a spherical conductor of radius $0.1\,m$ to produce an electric field of $0.036\, N/C$ just above its surface is

A particle of mass $1\ gm$ and charge $ - 0.1\,\mu C$ is projected from ground with a velocity $10\sqrt 2 $ at an $45^o$ with horizontal in the area having uniform electric field $1\ kV/cm$ in horizontal direction. Acceleration due to gravity is $10\ m/s^2$ in vertical downward direction. Select $INCORRECT$ statement

Great bear is a

If the angular momentum of an electron is $\overrightarrow {J\,} $ then the magnitude of the magnetic moment will be

In a step up transformer, if ratio of turns of primary to secondary is 1 : 10 and primary voltage is 230 V. If the load current is 2A, then the current in primary is

The curve between charge density and distance near $P-N$ junction will be

Lenz's law gives

In a step-up transformer, the turn ratio is 1 : 2. A Leclanche cell (e.m.f. 1.5V) is connected across the primary. The voltage developed in the secondary would be

Which of the following is not transported by electromagnetic waves?