The three thin lenses are marked as I, II and III. Paraxial ray incident on the lenses. Which of the above will cause light rays to diverge?

I only

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II only

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I and II only

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III only

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I, II, and III

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Solution

The correct option is C III only
The first lens is a biconvex lens. It is a converging lens. It converges the rays of light passing through it.
The second lens is one half of the biconvex lens. This part is also converging lens due to the right hand surface of the lens.
The third lens is a biconcave lens. It is a diverging lens, that is, it diverges the rays that pass through it.
Hence option D is the answer.

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Similar questions

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Reason: Paraxial rays incident parallel to principal axis intersect at the focus after refraction from lens.

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(i) Do not provide a continuous set of values,

(ii) Represent values as discrete steps,

(iii) Can utilize binary system, and

(iv) Can utilize decimal as well as binary systems.

Which of the above statements are true?

(a) (i) and (ii) only

(b) (ii) and (iii) only

(d) All of (i), (ii), (iii) and (iv).

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

Fill in the following blanks with suitable words : (a) A convex lens ___ rays of light, whereas a concave lens___ rays of light. (b) Lenses refract light to form images : a ___lens can form both real and virtual images, but a diverging lens forms only___ images.

Q. Fill in the following blanks with suitable words:
(a) A convex lens .................. rays of light, whereas a concave lens .................. rays of light.
(b) Lenses refract light to form images: a..................... lens can form both real and virtual images, but a diverging lens forms only ...................... images.

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