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Light (Optics) - Optical Instruments MCQs

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Light (Optics) - Optical Instruments

Light (Optics) - Optical Instruments MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Light (Optics) - Optical Instruments
What is the objective lens in a microscope mainly responsible for?
A. Controlling room temperature
B. Generating sound
C. Measuring voltage
D. Producing the primary magnified image of the specimen
Correct Answer: D
The objective provides most of the microscope's optical resolution and initial magnification.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Optical Instruments
Which device separates white light into a spectrum?
A. Barometer
B. Ammeter
C. Thermometer
D. Prism or diffraction grating
Correct Answer: D
Dispersion or diffraction can separate wavelengths of visible light.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Optical Instruments
What optical principle is used in a periscope?
A. Radioactivity
B. Conduction
C. Reflection
D. Electrical induction
Correct Answer: C
Periscopes use mirrors or prisms to redirect light.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Optical Instruments
What does a simple magnifying glass use?
A. A prism only
B. A convex lens
C. A plane glass slab
D. A concave mirror only
Correct Answer: B
A convex lens can form a magnified virtual image for an object within its focal length.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Optical Instruments
Which optical instrument is used to observe distant astronomical objects?
A. Telescope
B. Ammeter
C. Microscope
D. Stethoscope
Correct Answer: A
Telescopes collect and focus light from distant objects.
CSS - PMS - CCE - PCS - General Science Light (Optics) - Optical Instruments
Which optical instrument is used to view very small nearby objects at high magnification?
A. Periscope
B. Microscope
C. Barometer
D. Telescope
Correct Answer: B
Microscopes use lens systems to magnify small objects.
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