Microscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.
Consider the following statements about a microscope and a telescope : Both the eyepiece and the objective of a microscope are convex lenses. The focal length of the objective of a telescope is larger than the focal length of its eyepiece. The magnification of a telescope increases with the increase in focal length of its objective. The magnification of a microscope increases with the increase in focal length of its objective. Which of the statements given above are correct?
Asked in UPSC NDA 2 2018 · Topic: Optics (Optical Instruments: microscopes, telescopes, human eye)
More Physics questions
- Myopia is a defect in human vision where an image of a
- Ramesh cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
- Which one among the following is correct for a person suffering from myopia ?
- Myopia, also known as near-sightedness, can be corrected by use of :
- Which of the following is used in fire alarm?
- Solar energy is converted into electric energy through
- Which of the following statements about optical microscope is/are correct? 1. Both the eyepiece and objective of a microscope are convex lenses. 2. The magnification of a microscope increases with increase in focal length of the objective. 3. The magnification of a microscope depends upon the length of the microscope tube. 4. The eyepiece of a microscope is a concave lens. Select the correct answer using the code given below.
- Which one of the following statements with regard to a short-sighted person is correct?