Optical Instruments and Vision MCQs

Optical Instruments MCQs

• Telescopes are optical instruments used to view distant objects.
• Microscopes are primarily used to magnify small objects.
• The crystalline lens in the human eye functions similarly to a camera lens.
• In a compound microscope, the final image appears inverted and magnified.
• A telescope's objective lens gathers light from distant objects.
• An eyepiece in an optical instrument magnifies the image produced by the objective lens.
• Optical fibers use total internal reflection for signal transmission.
• Astigmatism arises from an irregular curvature of the cornea.
• Resolving power is a microscope’s capacity to distinguish between closely spaced objects.
• Myopia, or nearsightedness, is corrected using a concave lens.
• Reflecting telescopes employ mirrors to focus light.
• LASIK surgery primarily corrects refractive errors in the eye.
• The f-number of a camera lens indicates its light-gathering ability.
• The iris in the human eye regulates the amount of light entering.
• Binoculars use a combination of lenses and prisms for magnification and image correction.
• Blue light is scattered the most in the atmosphere, causing the sky to appear blue.
• A simple magnifying glass uses a convex lens.
• Chromatic aberration in lenses can be corrected with combined convex and concave lenses.
• The power of a lens is measured in diopters.
• Anti-reflective coatings on lenses reduce glare and increase light transmission.
• Prism spectroscopes separate light into its component colors.
• A camera's aperture controls the amount of light admitted.
• The near point of the human eye is the closest distance at which objects can be seen clearly.
• Rainbows form due to refraction, reflection, and dispersion of light in water droplets.
• Refractometers measure the refractive index of a material.
• The far point of a normal human eye is at infinity.
• Phase contrast microscopes are used to observe living cells in their natural state.
• A beam splitter divides a beam of light into two or more beams.
• Numerical aperture relates to microscope objectives.
• Periscopes function based on the reflection of light at two mirrors.
• Endoscopes are commonly used in medicine for internal examinations.
• The objective lens in a terrestrial telescope creates a real and inverted image.
• Oil immersion in microscopy increases numerical aperture and resolution.
• Optical scanners use the reflection and focusing of light.
• The unit of luminous intensity is candela.
• A small hole or aperture is essential for a camera obscura to function.
• Diffraction gratings disperse light into its component wavelengths.
• Zoom lenses vary the distance between lens elements.
• Reflecting telescopes are better for observing faint, distant galaxies.
• Collimators produce parallel beams of light in an optical system.

Test your understanding of optical instruments like telescopes and microscopes, along with vision-related concepts. Review the functions of lenses and how they correct vision defects. Explore principles like total internal reflection in optical fibers.