NEET Physics: Questions 1028 - 1031 of 2098

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Question number: 1028

» Ray Optics » Lens Maker's Formula and Lens Formula

Assertion-Reason▾

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

MCQ▾

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

MCQ▾

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-Reason▾

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

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