One can buy cheap microscope for use of children. The images seen in such microscope have colored edges, why is this so?

One can buy cheap microscope for use of children. The images seen in such microscope have colored edges, why is this so?
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Ans. The images in microscope have colored edges because of defects in lenses. Such a defect is known as chromatic aberration. In such a problem, a lens can’t bring all rays of white light to a single point on image. So image is not sharp and has colored edges.
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An electron microscope gives higher magnifications than an optical microscope because : (1) The velocity of electrons is smaller than that of light (2) The wavelength of electrons is smaller as compared to the wavelength of visible light (3) The electrons have more energy than the light particulars (4) The electron microscope uses more powerful lenses

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Last Answer : The wavelength of electrons is smaller as compared to the wavelength of visible light

What is a compound microscope? (1) A microscope that has one lens. (2) A microscope that has two sets of lenses : an occular lens and an eyepiece. (3) A microscope whose lenses are concave. (4) A microscope whose lenses are convex.

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Last Answer : A microscope that has two sets of lenses : an occular lens and an eyepiece.

The final image in a simple microscope is (1) real, diminished and inverted (2) real, magnified and erect (3) virtual, magnified and erect (4) virtual, diminished and erect

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Last Answer : virtual, magnified and erect

A microscope used in pathological laboratories forms (1) magnified, virtual, erect image (2) diminished, real and erect image (3) magnified, virtual and inverted image (4) diminished, virtual and erect image

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Last Answer : magnified, virtual and inverted image

One can distinguish a telescope from a microscope by observing (1) length (2) colour (3) size of the lens (4) length and size of the lens

Description : One can distinguish a telescope from a microscope by observing (1) length (2) colour (3) size of the lens (4) length and size of the lens

Last Answer : length and size of the lens

The instrument used to see the distant objects on the Earth is (1) Terrestrial telescope (2) Astronomical telescope (3) Compound microscope (4) Simple microscope

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Last Answer : Terrestrial telescope