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Topic
12th Grade
Physics
Optical Instruments And Some Natural Phenomena
Question
For which of the following colour, the magnifying power of a microscope will be maximum Â
Options:
A
.
 White colour Â
B
.
 Red colour Â
C
.
 Violet colour Â
D
.
 Yellow colour Â
Answer: Option C
:
C
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More Questions on This Topic :
Question 1.
Focal length of the objective and eyelenses of a telescope are 200 cm and 5 cm. The maximum magnifying power of th....5 cm. The maximum magnifying power of the telescope is
Question 2.
The magnifying power of a simple microscope can be increased, if we use eye-piece of....
Question 3.
When the length of a microscope tube increases, its magnifying power                         Â....a microscope tube increases, its magnifying power                                    [MNR 1986]
Question 4.
A man can see clearly up to 3 metres. Prescribe a lens for his spectacles so that he can see clearly up to 12 metres ....so that he can see clearly up to 12 metres
Question 5.
A compound microscope is used to enlarge an object kept at a distance 0.03m from it’s objective which consis....eye-piece of the microscope must be moved to refocus the image
Question 6.
A man can see the objects up to a distance of one metre from his eyes. For correcting his eyesight so that he can see an....object at infinity, he requires a lens whose power is
Question 7.
For a normal eye, the least distance of distinct vision is [CPMT 1984]....
Question 8.
Magnifying power of a simple microscope is (when final image is formed at D = 25 cm from eye) [MP PET 1996; BVP 2....D = 25 cm from eye) [MP PET 1996; BVP 2003]
Question 9.
The diameter of the eye-ball of a normal eye is about 2.5 cm. The power of the eye lens varies from....
Question 10.
A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should ....cm [CPMT 1977; MP PET 1985, 88; MP PMT 1990]
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