Advertisements
Advertisements
प्रश्न
Write the two important factors considered to increase the magnifying power?
Advertisements
उत्तर
We can increase the magnifying power of telescope by
1. increasing the focal length of the objective
2. decreasing the focal length of eyepiece
Thus, two factor considered to increase the magnifying power are the focal lengths of objective and eyepiece.
APPEARS IN
संबंधित प्रश्न
Write two important advantages of reflecting telescope over a refracting telescope.
You are given three lenses of power 0.5 D, 4 D, and 10 D to design a telescope.
1) Which lenses should be used as objective and eyepiece? Justify your answer.
2) Why is the aperture of the objective preferred to be large?
With regard to an astronomical telescope of refracting type~ state how you will increase its:
1) magnifying power
2) resolving power
State the condition under which a large magnification can be achieved in an astronomical telescope.
"A telescope resolves whereas a microscope magnifies." Justify this statement ?
Draw a labeled ray diagram of a reflecting telescope. Mention its two advantages over the refracting telescope.
A Galilean telescope is 27 cm long when focussed to form an image at infinity. If the objective has a focal length of 30 cm, what is the focal length of the eyepiece?
Draw a ray diagram of a refracting astronomical telescope when final image is formed at infinity. Also write the expression for its angular magnification (magnifying power).
With the help of a ray diagram explain the working of a reflecting telescope.
The magnifying power of an astronomical telescope in normal adjustment is 2.9 and the objective and the eyepiece are separated by a distance of 150 cm. Find the focal lengths of the two lenses.
