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UPSC Exam  >  UPSC Tests  >  Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - UPSC MCQ

Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - UPSC MCQ


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10 Questions MCQ Test - Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments

Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments for UPSC 2024 is part of UPSC preparation. The Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments questions and answers have been prepared according to the UPSC exam syllabus.The Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments below.
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Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 1
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In a thick plane mirror, which image is the brightest among multiple images?

Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 1
In a thick plane mirror system, multiple images are formed, but the second image is typically the brightest. As you move away from the mirror surface, the brightness of the images gradually diminishes.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 2
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What is the angle of incidence equal to in the laws of reflection?

Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 2
According to the laws of reflection, the angle of incidence (the angle at which light strikes a surface) is equal to the angle of reflection (the angle at which light is reflected from that surface). This principle holds true for all types of reflection, such as in plane mirrors.
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Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 3
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What is the formula for calculating the number of images formed when an object is placed between two inclined mirrors?

Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 3
The formula for calculating the number of images formed when an object is placed between two inclined mirrors is given by No. of images = n + 1, where "n" is the number of reflections between the mirrors.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 4
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What is the angle between the two strips of plane mirrors in a kaleidoscope?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 4
In a kaleidoscope, two strips of plane mirrors are typically placed at an angle of 60 degrees inside the tube. This angle helps create symmetrical patterns from the reflections of colored glass pieces.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 5
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What type of mirrors are used in vehicles as rearview mirrors or reflectors for streetlights?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 5
Convex mirrors are used in vehicles as rearview mirrors or reflectors for streetlights. They provide a wider field of view due to their ability to diverge light.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 6
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In a periscope, what is the angle between the two plane mirrors?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 6
In a periscope, two plane mirrors are fixed facing each other at an angle of 45 degrees to the line joining them. This arrangement allows the user to see over obstacles or crowds.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 7
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What is the phenomenon responsible for the formation of mirage in hot deserts?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 7
Mirage formation in hot deserts is primarily due to the phenomenon of refraction. The bending of light as it passes through layers of varying density in the hot desert air causes the mirage effect.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 8
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What is the critical angle in the context of total internal reflection?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 8
The critical angle is the angle of incidence at which total internal reflection occurs. When the angle of incidence exceeds the critical angle, no light is transmitted, and all of it is reflected back into the denser medium.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 9
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What is the main advantage of optical fibers in communication systems?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 9
The main advantage of optical fibers in communication systems is their immunity to electro-magnetic interference. This property makes them highly reliable for transmitting signals without distortion or loss due to external electromagnetic factors.
Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 10
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What is the optical phenomenon responsible for the formation of looming in cold deserts?
Detailed Solution for Test: Plane & Curved Mirror, Refraction, Lenses, Defects of Vision, Optical Instruments - Question 10

The formation of looming in cold deserts is primarily due to the optical phenomenon of total internal reflection. Total internal reflection can cause distant objects to appear higher or closer than they actually are, leading to the mirage effect known as looming.

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