All of the following statements are correct except - Vidyadip

MCQ

All of the following statements are correct except

A
The total length of an astronomical telescope is the sum of the focal lengths of its two lenses
✓
The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent
C
The magnification of an astronomical telescope can be increased by decreasing the focal length of the eye-piece
D
The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye-piece

✓

Answer

Correct option: B.

The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent

Final image formed by astronomical telescope is inverted not erect.

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 "MCQ" from Ray Optics→Ray Optics — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A student takes $50 \mathrm{gm}$ wax (specific heat $=0.6 \mathrm{kcal} / \mathrm{kg}^{\circ} \mathrm{C}$ ) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively

In an electric heater $4 amp$ current passes for 1 minute at potential difference of $250 volt$, the power of heater and energy consumed will be respectively

If the length of second's pendulum is decreased by $2 \%$, how many seconds it will lose per day

Power of a water pump is $2 \mathrm{~kW}$. If $g=10 \mathrm{~m} / \mathrm{sec}^2$, the amount of water it can raise in one minute to a height of $10 \mathrm{~m}$ is

The pressure in the tyre of a car is four times the atmospheric pressure at $300 K$. If this tyre suddenly bursts, its new temperature will be $(\gamma=1.4)$

Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to

A man is standing at a spring platform. Reading of spring balance is $60 kg$ wt. If man jumps outside platform, then reading of spring balance

In a diode $AM-$detector, the output circuit consist of $R=1 \mathrm{k} \Omega$ and $C=10$ $p F$. A carrier signal of $100 \mathrm{kHz}$ is to be detected. Is it good

What is the reading of voltmeter in the following figure

$540 \mathrm{~g}$ of ice at $0^{\circ} \mathrm{C}$ is mixed with $540 \mathrm{~g}$ of water at $80^{\circ} \mathrm{C}$. The final temperature of the mixture is