Download App

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

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 10. Wave optics4 Marks
MCQ
If intensity of each wave in the observed interference pattern in Young's double slit experiment is $I_0$. then for some point $P$ where the phase difference is $\phi $ , intensity $I$ will be
  • A
    $I = I_0\,\,cos\,\phi $
  • B
    $I = I_0\,\,cos^2\,\phi $
  • C
    $I = I_0\,\,(1+cos\,\phi )$
  • ✓
    $I = 2I_0\,\,(1+cos\,\phi )$
✓

Answer

Correct option: D.
$I = 2I_0\,\,(1+cos\,\phi )$
d
$\mathrm{I}=\mathrm{I}_{1}+\mathrm{I}_{2}+2 \sqrt{1_{1} \mathrm{I}_{2}} \cos \phi$

$\mathrm{I}_{\mathrm{R}}=\mathrm{I}_{0}+\mathrm{I}_{0}+2 \sqrt{I_{0} I_{0}} \cos \phi$

$\boxed{{{\text{I}}_{\text{R}}} = 2{{\text{I}}_0}(1 + \cos \phi )}$

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

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

Similar questions

For a domestic AC supply of $220 \,V$ at $50 \,cps$, the potential difference between the terminals of a two-pin electric outlet in a room is (in volt) given by
→
The equation of stationary wave along a stretched string is given by $y = 5\sin \frac{{\pi x}}{3}\cos 40\pi t$ where $x$ and $y$ are in centimetre and $t$ in second. The separation between two adjacent nodes is .... $cm$
→
The resistivity of a wire depends on its
→
Two circuits have mutual inductance of $0.1\, H$. What average $e.m.f$. is induced in one circuit when the current in the other circuit changes from $0$ to $20\, A$ in $0.02$ $s$......$V$
→
In the combination of the following gates the output $Y$ can be written in terms of inputs $A$ and $B$ as
→
An electric kettle takes $4\, A$ current at $220\,V.$ How much time will it take to boil $1\,\, kg$ of water circuits are consequences of from temperature $20\,^o C\, ?$ The temperature of $(a)$ conservation of energy and electric charge boiling water is $100\,^o C.$ ............... $min$
→
The sap in tree rises in a system of capillaries of radius $2.5 \times 10^{-5}\,m$. The surface tension of sap is $7.28 \times 10^{-2}\,N\,m^{-1}$ and the angle of contact is $0^o$. The maximum height to which sap can rise in a tree through capillarity action is ...... $m$ $(\rho _{sap} = 10^3\,kg \,m^{-3}$ )
→
Consider a thin uniform square sheet made of a rigid material. If its side is $‘a’$ mass $m$ and moment of inertia $I$ about one of its diagonals, then
→
When $1\, gm$ of water at ${0^o}C$ and $1 \times {10^5}\;N/{m^2}$ pressure is converted into ice of volume $1.091\;c{m^2}$, the external work done will be
→
How much mass of uranium to be destroyed per minute to operate a nuclear reactor of $600\,MW$
→