Question

Which statements about light microscopes are correct?

1. To calculate the magnification of a light microscope the eyepiece lens and objective lens magnifications are added together.

2. As the magnification increases the resolution decreases.

3. The resolution of a light microscope is limited by the wavelength of light.

4. The scale on a stage micrometer is resolved more clearly than an eyepiece graticule.


1,2,3 and 4
1,2,3 and 4

1,3, and 4 only
1,3, and 4 only

2 and 3 only
2 and 3 only

2 and 4 only
2 and 4 only

Answer 1

2 and 3 only is the correct answer ! Hope this helped

Answer 2

C. 2 and 3 only

Light Microscope:

1. The light microscope is an instrument for visualizing fine detail of an object.
2. It does this by creating a magnified image through the use of a series of glass lenses, which first focus a beam of light onto or through an object, and convex objective lenses to enlarge the image formed.
3. The resolution of the light microscope cannot be small than the half of the wavelength of the visible light, which is 0.4-0.7 µm.
4. The resolution of a light microscope is limited by the wavelength of light.
5. Resolution is a somewhat subjective value in optical microscopy because at high magnification an image may appear unsharp but still be resolved to the maximum ability of the objective.

Thus, statements 3 and 4 are correct. Therefore option C is right choice.

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