![A Galilean telescope measures 9 cm from the objective to the eye-piece. The focal length of the objective is 15 cm. Its magnifying power is A. $2.5$ B. $\\dfrac{2}{5}$ C. $\\dfrac{5}{3}$ D. $\\dfrac{3}{5}$ A Galilean telescope measures 9 cm from the objective to the eye-piece. The focal length of the objective is 15 cm. Its magnifying power is A. $2.5$ B. $\\dfrac{2}{5}$ C. $\\dfrac{5}{3}$ D. $\\dfrac{3}{5}$](https://www.vedantu.com/question-sets/6d65b193-5cee-40ad-bd7f-e58bdacc57961488974755165576376.png)
A Galilean telescope measures 9 cm from the objective to the eye-piece. The focal length of the objective is 15 cm. Its magnifying power is A. $2.5$ B. $\\dfrac{2}{5}$ C. $\\dfrac{5}{3}$ D. $\\dfrac{3}{5}$
Write the types of telescope. For a refractive telescope, derive relation for magnifying power. Also discuss about its construction and working. - Sarthaks eConnect | Largest Online Education Community
![Draw a ray diagram of astronomical telescope and derive the formula of its magnifying power when final image is formed at the least distance of the distinct vision Draw a ray diagram of astronomical telescope and derive the formula of its magnifying power when final image is formed at the least distance of the distinct vision](https://content-grail-production.s3.amazonaws.com/quetsion-media/6777fdb7-4f5b-4663-8c89-ba3f0b790cce-8621181.jpg)
Draw a ray diagram of astronomical telescope and derive the formula of its magnifying power when final image is formed at the least distance of the distinct vision
![An astronomical telescope has an eyepiece of focal-length 5cm. If the angular magnification - YouTube An astronomical telescope has an eyepiece of focal-length 5cm. If the angular magnification - YouTube](https://i.ytimg.com/vi/WDPW9wsZgVA/maxresdefault.jpg)