JEE · NEET Previous Year Question
In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be:
Topic: JEE PYQ
Answer: A. Full step-by-step solution below.
- A20 cm
- B30cm
- C10cm
- D15cm
Correct answer: A
Solution
(a)So
= 20 cm
More Optical Instruments PYQs
- The magnifying power of a telescope with tube length 60 is 5 . Then the focal length of its eye piece is
- A compound microscope is a magnification of 24. The focal length of the eyepiece is . The final image is forme…
- The magnifying power of a telescope with tube length 60 cm is 5. What is the focal length of its eye piece?
- A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively To view an object 200 cm away fro…
- In a microscope the objective is having focal length and eye-piece is having focal length…