Homework on Image Formation and Optical Principles in Microscopy

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

• Virtual and smaller

• Virtual and upright

• Real and upright

• Real and inverted

Which ray passes through the center of the lens without deviation?

• Diverging Ray

• Parallel Ray

• Central Ray

• Focal Ray

What is the main cause of spherical aberration?

• Light rays passing through the center

• Light rays striking the edge of a lens

• Light rays being parallel

• Different wavelengths of light

What does the eyepiece lens in a compound microscope do?

• Magnifies the image produced by the objective lens

• Focuses light onto the specimen

• Forms a real image

• Collects light from the specimen

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

• 200 nm

• 100 nm

• 500 nm

• 1 µm

Which type of microscopy uses fluorescent dyes?

• Dark Field Microscopy

• Phase Contrast Microscopy

• Fluorescence Microscopy

• Transmission Microscopy

What type of lens is used to correct myopia?

• Bifocal lenses

• Convex lenses

• Concave lenses

• Cylindrical lenses

What is the primary function of an endoscope?

• For internal examinations

• To magnify small objects

• To correct refractive errors

• To examine the retina

What type of aberration results in color fringing?

• Optical Aberration

• Spherical Aberration

• Geometric Aberration

• Chromatic Aberration

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

• They emerge parallel

• They diverge

• They form a virtual image

• They converge to a point