Download App

Wave Optics — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
MCQ
Resolving power of telescope increases when
  • ✓
    wavelength of light decreases
  • B
    wavelength of light increases
  • C
    focal length of eye-piece increases
  • D
    focal length of eye-piece decreases
✓

Answer

Correct option: A.
wavelength of light decreases
(a) : Resolving power of telescope $=\frac{a}{1.22 \lambda}$
$\therefore \quad$ It increases when the wavelength of light decreases and/or the objective lens of larger diameter is used.

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

More "M.C.Q (1 Marks)" from Wave Optics→Wave Optics — all question types→Physics STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

A parallel beam of monochromatic light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is
→
A potentiometer wire of length $10 m$ is connected in series with a battery. The emf of a cell balances against $250 \ cm$ length of wire. If length of potentiometer wire is increased by $1 m$, the new balancing length of wire will be
→
Two coils $P$ and $Q$ are kept near each other. When no current flows through coil $P$ and current increases in coil $Q$ at the rate $10 A / s$, the e.m.f. in coil $P$ is $15 mV$. When coil $Q$ carries no current and current of 1.8 A flows through coil $P$, the magnetic flux linked with the coil $Q$ is
→
In fundamental mode, the time required for the sound wave to reach upto the closed end of a pipe filled with air is ' $t$ ' second. The frequency of vibration of air column is
→
The tension in a piano wire is increased by 25%. Its frequency becomes ….. times the original frequency.
→
In finding the distance between the two coherent sources in Fresnel's biprism experiment by the conjugate foci method, one uses
→
A clock pendulum having coefficient of linear expansion $\alpha=9 \times 10^{-7} /{ }^{\circ} C$ has a period of $0.5 s$ at $20^{\circ} C$. If the clock is used in a climate where the temperature is $30^{\circ} C$, how much time does the clock lose in each oscillation? ( $g=$ constant)
→
The SI unit of the potential gradient is ______ 
→
In a single slit experiment, the width of the slit is doubled. Which one of the following statements is correct?
→
A string of length ℓ fixed at one end carries a mass m at the other. The string makes 2/π revolutions/sec around the vertical axis through the fixed end. The tension in the string is ______ 
→