Light UPSC Questions

Physics

Light MCQ Questions


1.
Match the following
List I List II
a) Luminous Object 1.) emit light of their own
b) Transparent Object 2.) we can see, but not clearly
c) Translucent Object 3.) allowing light to pass through it
A.
a-1,b-3,c-2
B.
a-1,b-2,c-3
C.
a-3,b-2,c-1
D.
a-2,b-1,c-3
😑 View Answer Rough Work Error
ANSWER :
A. a-1,b-3,c-2
2.
Organic Lights Emitting Diodes(OLEDs) are used to create digital in many devices. What are the advantages of OLED displays over Liquid Crystal displays?
1. OLED displays can be fabricated on flexible plastic substrates.
2. Roll-up displays embedded in clothing can be made using OLEDs.
3. Transparent displays are possible using OLEDs.
Select the correct answer using the code given below:
UPSC - 2017
A.
1 and 3 only
B.
2 only
C.
1,2 and 3
D.
None of the above statements is correct
😑 View Answer Rough Work Error
ANSWER :
C. 1,2 and 3
3.
______ object does not allow light to pass through them
A.
Transparent object
B.
Translucent object
C.
Opaque object
D.
None of the above
😑 View Answer Rough Work Error
ANSWER :
C. Opaque object
4.
What will happen, when opaque object comes in the path of light ______ are formed
A.
Shadows
B.
Reflection
C.
Refraction
D.
None of the above
😑 View Answer Rough Work Error
ANSWER :
A. Shadows
5.
With reference to 'LiFi', recently in the news, which of the following statements is/are correct?
1.It uses light as the medium for high speed data transmission.
2.It is a wireless technology and is several time faster than 'WiFi'.
UPSC - 2016
A.
1 only
B.
2 only
C.
Both 1 and 2
D.
Neither 1 nor 2
😑 View Answer Rough Work Error
ANSWER :
C. Both 1 and 2
6.
Which of the following statement is correct
(i) Pinhole cameras can be made with simple materials and can be used to image the sun and brightly lit objects
(ii) Mirror reflection gives us clear images
(iii) Opaque objects allow the light to pass through them partially.
A.
(i) and (ii) only
B.
(ii) and (iii) only
C.
(i) and (iii) only
D.
(i), (ii) and (iii)
😑 View Answer Rough Work Error
ANSWER :
A. (i) and (ii) only