Download App

STD 12 - 10. Wave optics — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 10. Wave optics4 Marks
MCQ
In a double slit experiment, at a certain point on the screen the path difference between the two interfering waves is $\frac{1}{8} ^{th}$ of a wavelength. The ratio of the intensity of light at that point to that at the centre of a bright fringe is
  • A
    $0.568$
  • B
    $0.672$
  • C
    $0.760$
  • ✓
    $0.583$
✓

Answer

Correct option: D.
$0.583$
d
$I=I_{0} \cos ^{2}\left(\frac{\Delta \phi}{2}\right)$

$\frac{I}{I_{0}}=\cos ^{2}\left(\frac{\Delta \phi}{2}\right)$

$\frac{I}{I_{0}}=\cos ^{2}\left(\frac{\frac{2 \pi}{\lambda} \times \frac{\lambda}{8}}{2}\right)$

$\frac{\mathrm{I}}{\mathrm{I}_{0}}=\cos ^{2}\left(\frac{\pi}{8}\right)$

$\frac{\mathrm{I}}{\mathrm{I}_{0}}=0.853$

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

When light is incident on a diffraction grating the zero order principal maximum will be
→
Frequency range of the audible sounds is
→
A mass $m$ attached to a spring oscillates every $2\, sec$. If the mass is increased by $2 \,kg$, then time-period increases by $1\, sec$. The initial mass is ..... $kg$
→
In the figure below, what is the potential difference between the point $A$ and $B$ and between $B$ and $C$ respectively in steady state
→
Asphere of radius $R$ and made of material of relative density $\sigma$ has a concentric cavity of radius $r$. It just floats when placed in a tank full of water. The value of the ratio $R/r$ will be 
→
In the figure shown the power generated in $y$ is maximum when $y = 5\,\Omega $. Then $R$ is
→
The length of a rod is $20\, cm$ and area of cross-section $2\,c{m^2}$. The Young's modulus of the material of wire is $1.4 \times {10^{11}}\,N/{m^2}$. If the rod is compressed by $5\, kg-wt$ along its length, then increase in the energy of the rod in joules will be
→
The internal resistance of a primary cell is $4\, ohm$. It generates a current of $0.2\, amp$ in an external resistance of $21\, ohm$. The rate at which chemical energy is consumed in providing the current is .............. $J/s$
→
For ${C_6}{H_5}CHO$ which of the following is incorrect
→
A compound microscope is used to enlarge an object kept at a distance $0.03\,m$ from it’s objective which consists of several convex lenses in contact and has focal length $0.02\,m$. If a lens of focal length $0.1\,m$ is removed from the objective, then by what distance the eye-piece of the microscope must be moved to refocus the image......$cm$
→