Telescope

The expression for astronomical telescope magnifying power is

Draw a labelled ray diagram of a reflecting telescope. Mention its two advantages over the refracting telescope.

Draw a schematic labelled ray diagram of a reflecting type telescope and The objective of a telescope is of larger focal length and of larger aperture (compared to the eyepiece). Why? Give reasons.

State the conditions for the phenomenon of total internal reflection to occur. 

What are the disadvantages of using a reflecting telescope.

Describe Briefly the Two Main Limitations and Explain How Far These Can Be Minimised in a Reflecting Telescope 

How a Newtonian telescope works and What are some limitations of Newtonian reflecting telescopes

Why is it advised to use a telescope in the clear sky.

What is the Difference Between a Reflecting Telescope and Refracting Telescope?

Draw a ray diagram of reflecting type telescope and hence given the advantage of reflecting type telescope.

Draw a labelled ray diagram of a reflecting telescope. Mention its two advantages over the refracting telescope.

An astronomical telescope has a converging eye-piece of focal length $5 \mathrm{cm}$ and objective of focal length $80 \mathrm{cm}$. When the final image is formed at the least distance of distinct vision $(25 \mathrm{cm})$, the separation between the two lenses is

State the condition under which a large magnification can be archived in an astronomical telescope.

In an astronomical telescope in normal adjustment, a straight black line of length$\mathrm{L}$ is drawn on the objective lens. The eyepiece forms a real image of this line. The length of this image is $\mathrm{Z}$

The magnifying power of a compound microscope can be increased by

An astronomical telescope has a converging eyepiece of focal length $5 \mathrm{cm}$ and an objective of focal length $80 \mathrm{cm}$ . When the final image is formed at the least distance of distinct vision$\left(25 \mathrm{cm}\right)$, the separation between the two lenses is

An observer looks at a tree of height $15 \mathrm{m}$ with a telescope of magnifying power $10$. To him the tree appears

A telescope has an objective of focal length $50 \mathrm{cm}$ and an eye piece of focal length $5 \mathrm{cm}$ The least distance of distinct vision is $25 \mathrm{cm}.$ The telescope is focussed from distinct vision on a scale $200 \mathrm{cm}$ away. The separation between the objective and the eye-piece in $\mathrm{cm}$ is, if final image is formed at least distance of clear vision:-

Galileo's telescope consists of four lenses located at the ends of a long tube.

How many lenses are in a Galileo's telescope?