Explore Exams
Login Signup
Sign in Open App
UPSC Exam  >  UPSC Test  >  Science & Technology CSE  >  Test: Light - 2 - UPSC MCQ

Light - 2 - Free MCQ Practice Test with solutions, UPSC Sci & Tech


MCQ Practice Test & Solutions: Test: Light - 2 (15 Questions)

You can prepare effectively for UPSC Science & Technology for UPSC CSE with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Light - 2". These 15 questions have been designed by the experts with the latest curriculum of UPSC 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 15 minutes
  • - Number of Questions: 15

Sign up on EduRev for free to attempt this test and track your preparation progress.

Test: Light - 2 - Question 1
Save

What is the main purpose of using optical aids for visually impaired individuals?

Detailed Solution: Question 1

Optical aids are used to correct or enhance vision for visually impaired individuals. These include devices such as magnifiers, bifocal lenses, and contact lenses.

Test: Light - 2 - Question 2
Save

What should you do if particles of dust enter your eyes?

Detailed Solution: Question 2

If particles of dust enter your eyes, you should wash your eyes with clean water to remove the particles. Rubbing your eyes can cause further irritation or damage.

Clear all your doubts with EduRev
Test: Light - 2 - Question 3
Save

How does a periscope allow one to see objects that are not directly visible?

Detailed Solution: Question 3

A periscope allows one to see objects that are not directly visible by using two plane mirrors positioned at 45-degree angles. The first mirror reflects light from the object toward the second mirror, which then directs the light to the observer's eyes. This arrangement enables viewing around obstacles or over barriers without a direct line of sight. A single mirror would not redirect light appropriately, a telescope is used for magnifying distant objects, and a magnifying glass is for enlarging nearby objects.

Test: Light - 2 - Question 4
Save

What is the purpose of using a periscope in submarines and tanks?

Detailed Solution: Question 4

A periscope is used in submarines and tanks to view objects outside without needing a direct line of sight. This is achieved by reflecting light through a series of mirrors.

Test: Light - 2 - Question 5
Save

What is the role of the retina in the process of vision?

Detailed Solution: Question 5

The retina processes visual information by converting light into neural signals, which are then sent to the brain through the optic nerve for interpretation.

Test: Light - 2 - Question 6
Save

What happens to the light entering the eye once it passes through the cornea and pupil?

Detailed Solution: Question 6

After passing through the cornea and pupil, light is focused on the retina by the lens. The retina then processes the light and sends visual information to the brain through the optic nerve.

Test: Light - 2 - Question 7
Save

How does a lens in the human eye adjust to focus on different distances?

Detailed Solution: Question 7

The lens in the human eye changes its curvature to focus light on the retina for objects at different distances. This adjustment helps in clear vision of both near and distant objects.

Test: Light - 2 - Question 8
Save

Talking calculators is an example of

Detailed Solution: Question 8

Talking calculators are an example of Electronic aid. They help in performing many computational tasks.

Test: Light - 2 - Question 9
Save

Which part of the human eye is resposible for color perception?

Detailed Solution: Question 9

Cones are responsible for the color perception in our eyes. Rods help in sharpness of the image. Cones are sensitive to bright light whereas rods are sensitive to dim light.

Test: Light - 2 - Question 10
Save

What visual defect is commonly associated with aging and results from a cloudy lens?

Detailed Solution: Question 10

Cataract is a visual defect associated with aging, where the lens becomes cloudy, leading to a loss of vision. It can be treated by removing the opaque lens and replacing it with an artificial one.

Test: Light - 2 - Question 11
Save

The persistent impression of an image on the retina for about 1/16th of a second allows us to perceive what phenomenon?

Detailed Solution: Question 11

The persistence of an image on the retina for about 1/16th of a second helps us perceive continuous motion. This is why a series of still images, when flashed quickly, are perceived as smooth, continuous motion.

Test: Light - 2 - Question 12
Save

What is the result of looking directly at the Sun or a powerful light source?

Detailed Solution: Question 12

Looking directly at the Sun or a powerful light source can cause retinal injury due to the intense light damaging the sensitive cells in the retina. This can lead to permanent vision damage.

Test: Light - 2 - Question 13
Save

What visual condition results when a person cannot see distant objects clearly but can see nearby objects well?

Detailed Solution: Question 13

Myopia, or nearsightedness, is a condition where a person can see nearby objects clearly but has difficulty seeing distant objects. Corrective lenses can help focus light correctly on the retina.

Test: Light - 2 - Question 14
Save

What is the common treatment for cataracts?

Detailed Solution: Question 14

The common treatment for cataracts is the surgical removal of the opaque lens and its replacement with an artificial lens, which restores clear vision.

Test: Light - 2 - Question 15
Save

What is the blind spot in the human eye?

Detailed Solution: Question 15

The blind spot is the point on the retina where the optic nerve leaves the eye to carry visual information to the brain. This region does not contain photoreceptor cells (rods and cones), so it cannot detect light, creating a small gap in the visual field.

71 videos|498 docs|199 tests
Join Course
Information about Test: Light - 2 Page
In this test you can find the Exam questions for Test: Light - 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Light - 2, EduRev gives you an ample number of Online tests for practice
Download as PDF
;

About this UPSC Practice Test

This test contains 15 MCQs on Light - 2 with detailed solutions for each question. It is part of the Science & Technology for UPSC CSE course on EduRev, designed to align with the current UPSC syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

Explore more UPSC Study Resources

If you found this Light - 2 MCQ Test helpful, you can further enhance your UPSC preparation with in-depth courses on EduRev, for all the subjects and topics available in Science & Technology for UPSC CSE course. The course offers:
  • Video Lectures: covering all the topics of Science & Technology for UPSC CSE
  • Notes for Revision: offering revision notes, important questions, summaries, flashcards, cheatsheets & more for UPSC preparation
  • MCQ Test: variety of questions as per the pattern of UPSC exam
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup