Question
Draw a labelled ray diagram to show the image formation in a refracting type astronomical telescope. Why should the diameter of the objective of a telescope be large?
✓
Answer
Alternate Answer
High resolving power/Large light gathering power/Intensity of image more.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
An electron gun emits $2.0 × 10^{16}$ electrons per second. What electric current does this correspond to?
→Define the phenomenon of total internal reflection.
A point source is placed at a depth h below the surface of water (refractive index = μ).
- Show that light escapes through a circular area on the water surface with its centre directly above the point source.
- Find the angle subtended by a radius of the area on the source.
Write short note on Nuclear Force.
Explain in short about electric dipole.
The yellow colour has a greater luminous efficiency as compared to the other colours. Can we increase the illuminating power of a white light source by putting a yellow plastic paper around this source?
Identify the logic gates marked 'P' and 'Q' in the given circuit. Write the truth table for the combination.
Calculate the mass of an $\alpha$-particle. Its binding energy is 28.2MeV.
→Explain in brief about emission spectrum and absorption spectrum.
Each of the resistances shown in figure. has a value of $20\Omega.$ Find the equivalent resistance between A and B. Does it depend on whether the point A or B is at higher potential?
→