HARD
12th Odisha Board
IMPORTANT
Earn 100
Write notes on magnifying power of
(a) a magnifier
Important Questions on Eye and Optical Instruments
HARD
12th Odisha Board
IMPORTANT
Write notes on magnifying power of
(b) a compound microscope
MEDIUM
12th Odisha Board
IMPORTANT
Write notes on magnifying power of:
(c) an astronomical telescope.
HARD
12th Odisha Board
IMPORTANT
With a neat ray diagram, describe the principle, working and use of a compound microscope. What should be done for achieving large magnifying power?
HARD
12th Odisha Board
IMPORTANT
With a neat ray diagram, describe the principle, working and use of an astronomical telescope.
MEDIUM
12th Odisha Board
IMPORTANT
A short-sighted man can read printed matter distinctly when it is held from his eye. Find the focal length of the glasses which he must use if he wishes to read with ease a book at a distance of .
MEDIUM
12th Odisha Board
IMPORTANT
A long-sighted person can see clearly at any distance more than . What kind of lens should he use in spectacles to be able to read print placed at from his eye? What is the power of this lens?
MEDIUM
12th Odisha Board
IMPORTANT
A person can focus objects only when they lie between and from his eyes. What spectacles should he use to increase his maximum distance of distinct vision to infinity.
MEDIUM
12th Odisha Board
IMPORTANT
A simple microscope is made of a combination of two lenses in contact of powers and . Calculate the magnifying power of the microscope if the image is formed at the least distance of distinct vision meter.
