MCQ
In Young's double slit experiment how many maximas can be obtained on a screen (including the central maximum) on both sides of the central fringe if $\lambda=2000 \mathring A$ and $d=7000 \mathring A$
- A(a) 12
- B(b) 7
- ✓(c) 18
- D(d) 4
✓
Answer
Correct option: C.
(c) 18
(c)$\text { Shift }=\frac{\beta}{\lambda}(\mu-1) t $
$\Rightarrow 7 \beta=\frac{\beta}{\lambda}(\mu-1) t $
$\Rightarrow t=\frac{7 \lambda}{(\mu-1)}$
$=\frac{7\times 600}{(1.5-1)}=8400 nm$
$\Rightarrow 7 \beta=\frac{\beta}{\lambda}(\mu-1) t $
$\Rightarrow t=\frac{7 \lambda}{(\mu-1)}$
$=\frac{7\times 600}{(1.5-1)}=8400 nm$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The internal resistance of a cell depends on
The electric intensity $E$, current density $j$ and specific resistance $k$ are related to each other by the relation
→ An electron is the ground state of hydrogen atom is revolving in anticlockwise direction in a circular orbit of radius $'r'$. The atom is placed is a unifom magnetic field $B$ in such a way magnetic moment of orbital electron makes an angle $30^o$ with the magnetic field. The torque experienced by orbital electon is
→A cannon ball is fired with a velocity $200 \mathrm{~m} / \mathrm{sec}$ at an angle of $60^{\circ}$ with the horizontal. At the highest point of its flight it explodes into $3$ equal fragments, one going vertically upwards with a velocity $100\ \mathrm{m} / \mathrm{sec}$, the second one falling vertically downwards with a velocity $100 \mathrm{~m} / \mathrm{sec}$. The third fragment will be moving with a velocity
→A gas is being compressed adiabatically. The specific heat of the gas during compression is
The amount of work done in forming a soap film of size $10 \mathrm{~cm} \times 10 \mathrm{~cm}$ is (Surface tension $T=3 \times 10^{-2} \mathrm{~N} / \mathrm{m}$ )
→In a transistor circuit shown here the base current is $35 \mu A$. The value of the resistor $R$ is
→If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of
The valence of an impurity added to germanium crystal in order to convert it into a $P$-type semi conductor is
→A bar magnet of length $10 \mathrm{~cm}$ and having the pole strength equal to $10.$ weber is kept in a magnetic field having magnetic induction $(B)$ equal to $4 \pi \times 10^{-3}$ Tesla. It makes an angle of $30$ with the direction of magnetic induction. The value of the torque acting on the magnet is $\left(\mu_0=4 \pi \times 10^{-7}\right.$ weber / amp $\left.\times \mathrm{m}\right)$
→