Compound Microscope
Trending Questions
The focal length of the objective lens of a compound microscope is [CPMT 1985; MNR 1986; M
- Equal to the focal length of its eye piece
Less than the focal length of eye piece
Greater than the focal length of eye piece
Any of the above three
What will the value of angular magnification be if the final image is formed at near point, instead of infinity?
m=(LfO)(1+D/fe)
m=(Lfe)(1+D/fO)
m=LfO
m=LDfOfe
- 5
- -5
- 6
- -6
How should people wearing spectacles work with a microscope
- They cannot use the microscope at all
They should take off spectacles
- They should keep on wearing their spectacles
(b) and (c) is both way
The magnifying power of a microscope with an objective of 5 mm focal length is 400. The length of its tube is 20 cm. Then the focal length of the eye-piece is [MP PMT 1991]
200 cm
2.5 cm
160 cm
0.1 cm
Microscope is an optical instrument which
Enlarges the object
Increases the visual angle formed by the object at the eye
Decreases the visual angle formed by the object at the eye
Brings the object nearer
When the length of a microscope tube increases, its magnifying power [MNR 1986]
Increases
Does not change
- May decrease or increase
- Decreases
In a compound microscope, if the objective produces an image Io and the eye piece produces an image Ie, then
- Io is virtual but Ie is real
Io is real but Ie is virtual
Io and Ie are both virtual
Io and Ie are both real
- 12.67 cm
- 13.00 cm
- 12.00 cm
- 11.67 cm
- 160 cm
- 2.5 cm
- 0.1 cm
- 200 cm