Download App

Ray Optics and Optical Instruments Physics - Ray Optics and Optical Instruments

CBSE - STD 12 Science - Physics (CBSE - English Medium). 129 questions in this chapter.

Question types

Ray Optics and Optical Instruments question types

129 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

129
Questions
6
Question groups
5
Question types
Sample Questions

Ray Optics and Optical Instruments questions

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

Q 1M.C.Q (1 Marks)1 Mark
If the magnification of objective and eyepiece in a compound microscope is ' $m_o$ ' and ' $m_e$ ' respectively, then the total magnifying power $( m )$ of the microscope will be :
  • A
    $m_o+m_e$
  • B
    $m_e-m_o$
  • ✓
    $m_o \cdot m_e$
  • D
    $\frac{m_o}{m_e}$

Answer: C.

View full solution →
Q 2M.C.Q (1 Marks)1 Mark
If the magnification of optical instrument is negative, then the image will always be formed :
  • ✓
    Real and inverted
  • B
    Virtual and erect
  • C
    Real and erect
  • D
    Virtual and inverted

Answer: A.

View full solution →
Q 4M.C.Q (1 Marks)1 Mark
If the refractive index of denser medium 1 relative to rare medium 2 is $n_{12}$ and the critical angle for the pair of these mediums is $i_{ c }$, then the relationship between $n _{12}$ and $i_c$ is :
  • A
    $n_{12}=\sin i_c$
  • B
    $n_{12}=\tan i_c$
  • C
    $n_{12}=\frac{1}{\tan i_c}$
  • ✓
    $n_{12}=\frac{1}{\sin i_c}$

Answer: D.

View full solution →
Q 163 Marks Question3 Marks
Write the definition of wavefront. Using Huygens' principle, draw the shape of a plane wave incident on a convex lens and the refracted wave body.
###
(a) When a wave propagates from a rarer medium to a denser medium, then which characteristic of that wave does not change and why?
(b) The refractive indices of two mediums are $\mu_1$ and $\mu_2$, what will be the ratio of velocities in the wave in them?
View full solution →
Q 173 Marks Question3 Marks
(a) When a telescope is turned upside down and looked at the objective, it appears very small, why?
(b) Why does this not happen in a microscope?
View full solution →
Q 183 Marks Question3 Marks
(a) Stars located very far away, which cannot be seen with the eye, can be seen through a telescope. Why?
(b) The magnifying power of two telescopes is the same but the apertures of their objective lenses are different. What will be the change in the final images formed by them?
View full solution →
Q 215 Marks Questions5 Marks
Define total internal reflection. Establish the relation between $u, v$ and $f$ for a spherical mirror. Draw the necessary ray diagram. ### Define lateral displacement. Derive the lens maker formula.
$
\frac{1}{f}=\left(n_{21}-1\right)\left(\frac{1}{R_1}-\frac{1}{R_2}\right)
$
Draw the necessary ray diagram. (Where the signs have their usual meanings.)
View full solution →
Q 225 Marks Questions5 Marks
$(a)$ What is meant by compound microscope? Draw a ray diagram of image formation by a compound microscope. Briefly describe its working and derive the formula for its total magnification.
$(b)$ How does the resolving power of a microscope change when :
$(i)$ The diameter of the objective lens decreases,
$(ii)$ The wavelength of incident light increases?Justify your answer in each case.
View full solution →
Q 235 Marks Questions5 Marks
Draw a labelled diagram of a refracting telescope. Obtain an expression for its magnifying power. Write two main disadvantages of refracting telescope as compared to reflecting telescope. $\#\#\#$ What is meant by telescope? Draw the ray diagram of image formation by a refracting telescope. Briefly describe its working and derive the formula for its magnifying power.
View full solution →
Browse all question groups ↑

Generate a Ray Optics and Optical Instruments paper free

Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.

Download App
Generate Paper FreeAll Physics chapters