NEET (NTANational Eligibility cum Medical Entrance Test) Physics: Questions 1028  1031 of 2142
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Question number: 1028
» Ray Optics » Lens Maker's Formula and Lens Formula
Assertion (Ꭺ)
The sun looks bigger at sunrise and sunset than at noon
Reason (Ꭱ)
The atmosphere of the earth, due to its density gradient, acts as a lens.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

c.  Ꭺ is false but Ꭱ is true 

d.  Both Ꭺ and Ꭱ are false 

Question number: 1029
» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes
Question
The light gathering power of a camera lens doesn’t depend on
(1) Ratio of focal length and diameter
(2) Product of focal length and diameter
(3) Wavelength of light used
(4) Its diameter
Select the correct answers and mark it according to the following codes:
Codes:
Choices
Choice (4)  Response  

a.  1 and 2 are correct 

b.  1, 2 and 3 are correct 

c.  2 and 4 are correc 

d.  1 and 3 are correct 

Question number: 1030
» Ray Optics » Lens Maker's Formula and Lens Formula
Question
A convex lens of focal length 10.0 cm is placed in contact with a convex lens of 15.0 cm focal length. What is the focal length of the combination?
Choices
Choice (4)  Response  

a.  4 cm 

b.  12 cm 

c.  8 cm 

d.  6 cm 

Question number: 1031
» Ray Optics » Lens Maker's Formula and Lens Formula
Assertion (Ꭺ)
The focal length of lens changes when red light is replaced by blue light.
Reason (Ꭱ)
The focal length of lens does not depend on color of light used.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Both Ꭺ and Ꭱ are false 

c.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

d.  Ꭺ is true but Ꭱ is false 
