Advertisements
Advertisements
Question
What is meant by a microscope in normal use?
Solution
- A device that permits viewing items that are too small for the naked eye to see.
- It has two lenses (set of two lenses).
- These lenses are objective and ocular, they use visible light as a source of illumination.
APPEARS IN
RELATED QUESTIONS
How can the resolving power of a compound microscope be increased? Use relevant formula to support your answer.
How is 'limit of resolution' related to resolving power of a microscope ?
Draw a ray diagram showing the image formation by a compound microscope. Hence obtained expression for total magnification when the image is formed at infinity.
Can the image formed by a simple microscope be projected on a screen without using any additional lens or mirror?
A simple microscope using a single lens often shows coloured image of a white source. Why?
The separation between the objective and the eyepiece of a compound microscope can be adjusted between 9.8 cm to 11.8 cm. If the focal lengths of the objective and the eyepiece are 1.0 cm and 6 cm respectively, find the range of the magnifying power if the image is always needed at 24 cm from the eye
Define the magnifying power of a microscope in terms of visual angle.
A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again?
A thin converging lens of focal length 5cm is used as a simple microscope. Calculate its magnifying power when image formed lies at:
- Infinity.
- Least distance of distinct vision (D = 25 cm).
The focal lengths of the objective and the eye-piece of a compound microscope are 1.0 cm and 2.5 cm respectively. Find the tube length of the microscope for obtaining a magnification of 300.
