Quiz on Image Formation and Optical Principles in Microscopy

What type of image is formed when the object is placed beyond 2F?

• Virtual and upright

• Real and inverted

• Real and upright

• Virtual and smaller

Which type of aberration occurs when light rays focus at different points?

• Spherical Aberration

• Geometric Aberration

• Chromatic Aberration

• Optical Aberration

What is the role of the objective lens in a compound microscope?

• To magnify the image further

• To collect light from the specimen

• To produce a real, inverted image

• To produce a virtual image

What is the limit of resolution in optical microscopy typically around?

• 1 µm

• 500 nm

• 200 nm

• 100 nm

Which microscopy technique uses fluorescent dyes?

• Phase Contrast Microscopy

• Transmission Microscopy

• Fluorescence Microscopy

• Dark Field Microscopy

What type of lens is used to correct myopia?

• Bifocal lenses

• Cylindrical lenses

• Concave lenses

• Convex lenses

What is the primary function of an ophthalmoscope?

• To magnify small objects

• To perform internal examinations

• To analyze cellular structures

• To examine the retina

What happens to rays when the object is placed at the focal point (F)?

• They emerge parallel

• They form a virtual image

• They converge to a point

• They diverge

Which type of aberration is caused by different wavelengths of light being refracted differently?

• Optical Aberration

• Geometric Aberration

• Chromatic Aberration

• Spherical Aberration

What technique can improve the resolving power of optical microscopes?

• Oil immersion

• Using lower magnification

• Using monochromatic light

• Reducing light intensity