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Ray Optics JEE physics - Ray Optics

CBSE - STD 12 Science - JEE physics (CBSE - English Medium). 880 questions in this chapter.

Question types

Ray Optics question types

880 questions across 2 question groups — pick any mix to generate a JEE physics paper with step-by-step answer keys.

880
Questions
2
Question groups
5
Question types
Sample Questions

Ray Optics questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1Assertion & Reason1 Mark
Assertion : The frequencies of incident, reflected and refracted beam of monochromatic light incident from one medium to another are same.
Reason : The incident, reflected and refracted rays are coplanar
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Q 5Assertion & Reason1 Mark
Assertion : The resolving power of a telescope is more if the diameter of the objective lens is more.
Reason : Objective lens of large diameter collects more light.
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Q 6MCQ1 Mark
A combination of two thin convex lenses of focal length $0.3 \mathrm{~m}$ and $0.1 \mathrm{~m}$ will have minimum spherical and chromatic aberrations if the distance between them is
  • A
    $0.1 \mathrm{~m}$
  • ✓
    $0.2 \mathrm{~m}$
  • C
    $0.3 \mathrm{~m}$
  • D
    $0.4 \mathrm{~m}$

Answer: B.

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Q 7MCQ1 Mark
A compound microscope has an eye piece of focal length $10 \mathrm{~cm}$ and an objective of focal length $4 \mathrm{~cm}$. Calculate the magnification, if an object is kept at a distance of $5 \mathrm{~cm}$ from the objective so that final image is formed at the least distance vision $(20 \mathrm{~cm})$
  • ✓
    $12$
  • B
    $11$
  • C
    $10$
  • D
    $13$

Answer: A.

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Q 8MCQ1 Mark
Material $A$ has critical angle $i_A$, and material $B$ has critical angle $i_B\left(i_B>i_A\right)$. Then which of the following is true
(i) Light can be totally internally reflected when it passes from $B$ to $A$
(ii) Light can be totally internally reflected when it passes from $A$ to $B$
(iii) Critical angle for total internal reflection is $i_B-i_A$
(iv) Critical angle between $A$ and $B$ is $\sin ^{-1}\left(\frac{\sin i_A}{\sin i_B}\right)$
  • A
    (a) (i) and (iii)
  • B
    (b) (i) and (iv)
  • C
    (c) (ii) and (iii)
  • ✓
    (d) (ii) and (iv)

Answer: D.

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Q 9MCQ1 Mark
Spherical aberration in a lens
  • A
    Is minimum when most of the deviation is at the first surface
  • B
    Is minimum when most of the deviation is at the second surface
  • ✓
    Is minimum when the total deviation is equally distributed over the two surface
  • D
    Does not depend on the above consideration

Answer: C.

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Q 10MCQ1 Mark
A bi$-$convex lens made of glass $($refractive index $1.5)$ is put in a liquid of refractive index $1.7$. Its focal length will
  • ✓
    Decrease and change sign
  • B
    Increase and change sign
  • C
    Decrease and remain of the same sign
  • D
    Increase and remain of the same sign

Answer: A.

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