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 $\lambda = 2000\,{Å}$ and $d = 7000\,{Å}$
- A$12$
- ✓$7$
- C$18$
- D$4$
✓
Answer
Correct option: B.
$7$
b
(b) For maximum intensity on the screen
$d\sin \theta = n\lambda \Rightarrow \sin \theta = \frac{{n\lambda }}{d} = \frac{{n(2000)}}{{7000}} = \frac{n}{{3.5}}$
Since maximum value of $\sin \theta $ is $1$
So $n = 0,\,\,1,\,\,2,\,\,3,$ only. Thus only seven maximas can be obtained on both sides of the screen.
(b) For maximum intensity on the screen
$d\sin \theta = n\lambda \Rightarrow \sin \theta = \frac{{n\lambda }}{d} = \frac{{n(2000)}}{{7000}} = \frac{n}{{3.5}}$
Since maximum value of $\sin \theta $ is $1$
So $n = 0,\,\,1,\,\,2,\,\,3,$ only. Thus only seven maximas can be obtained on both sides of the screen.
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 $ i-V$ characteristic of a $P-N$ junction diode is shown below. The approximate dynamic resistance of the $P-N$ junction when a forward bias of $1\;volt $ is applied.......$\Omega$
→In the given circuit The current through the battery is........$A$
→Which of the following statements are true regarding radioactivity
→$(I)$ All radioactive elements decay exponentially with time
$(II)$ Half life time of a radioactive element is time required for one half of the radioactive atoms to disintegrate
$(III)$ Age of earth can be determined with the help of radioactive dating
$(IV)$ Half life time of a radioactive element is $50\%$ of its average life periodSelect correct answer using the codes given belowCodes :
Six point charges are placed at the vertices of a regular hexagon of side $a$ as shown. If $E$ represents electric field and $V$ represents electric potential at $O$, then
→Resistors of $1$, $2$, $ohm$ are connected in the form of a triangle. If a $1.5\, volt$ cell of negligible internal resistance is connected across $3\, ohm$ resistor, the current flowing through this resistance will be ................ $amp$
→What is the net magnetic flux through a closed surface?
For the study of the helical structure of nucleic acids, the property of electromagnetic radiation generally used is
Consider a parallel plate capacitor of 10 μF (micro-farad) with air filled in the gap between the plates. Now one half of the space between the plates is filled with a dielectric of dielectric constant 4, as shown in the figure. The capacity of the capacitor changes to
As shown in the figure a particle is placed at $O$ in front of a plane mirror $M$. $A$ man at $P$ can move along path $PY$ and $PY'$ then which of the following is true
→The plane surface of a plano-convex lens of focal length f is silvered. It will behave as