MCQ
Two sources give interference pattern which is observed on a screen, D distance apart from the sources. The fringe width is 2w. If the distance D is now doubled, the fringe width will
- ABecome w/2
- BRemain the same
- CBecome w
- ✓Become 4w
✓
Answer
Correct option: D.
Become 4w
Become 4w
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
In which of the following the final image is erect?
The value of charge $q_1, q_2$ and $q_3$ as shown in the figure are
→A $p-n$ junction $(D)$ shown in the figure can act as a rectifier. An alternating current source $(V)$ is connected in the circuit. The current $(I)$ in the resistor $(R)$ can be shown by
→In the given figure, if the Wheatstone bridge is in balanced condition, then the value of resistance 'S' will be
Consider a photon of continuous X-ray and a photon of characteristic X-ray of the same wavelength. Which of the following is/are different for the two photons?
Consider an $LC$ circuit, with inductance $L =0.1 H$ and capacitance $C=10^{-3} F$, kept on a plane. The area of the circuit is $1 m ^2$. It is placed in a constant magnetic field of strength $B_0$ which is perpendicular to the plane of the circuit. At time $t=0$, the magnetic field strength starts increasing linearly as $B=B_0+\beta t$ with $\beta=0.04 T s^{-1}$. The maximum magnitude of the current in the circuit is. . . . $m A$.
→A parallel plate capacitor with plate separation $5$ $\mathrm{mm}$ is charged up by a battery. It is found that on introducing a dielectric sheet of thickness $2 \mathrm{~mm}$, while keeping the battery connections intact, the capacitor draws $25 \%$ more charge from the battery than before. The dielectric constant of the sheet is_____.
→An ionic atom equivalent to hydrogen atom has wavelength equal to 1/4 of the wavelengths of hydrogen lines. The ion will be
Some radioactive nucleus may emit
An important spectral emission line has a wavelength of $21 cm$. The corresponding photon energy is
→$(h = 6.62 \times {10^{ - 34}}Js;\;\;c = 3 \times {10^8}m/s)$