Download App

Wave Optics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
MCQ
Four light waves are represented by

  1. $\text{y}=\text{a}_1\sin\omega\text{t}$

  2. $\text{y}=\text{a}_2\sin(\omega\text{t}+\in)$

  3. $\text{y}=\text{a}_1\sin2\omega\text{t}$

  4. $\text{y}=\text{a}_2\sin2(\omega\text{t}+\in)$

Interference fringes may be observed due to superposition of:

    • A
      (i) and (ii)
    • B
      (i) and (iii)
    • C
      (ii) and (iv)
    • D
      (iii) and (iv)
    ✓

    Answer

    1. (i) and (ii)
    1. (iii) and (iv)

    Explanation:

    The waves are travelling with the same frequencies and varying by constant phase difference. 

    Need a full question paper?

    Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

    Start Generating Free

    Explore more

    More "M.C.Q (1 Marks)" from Wave Optics→Wave Optics — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

    Similar questions

    Two identical batteries, each of e.m.f. 2 volt and internal resistance 1.0 ohm are available to produce heat in an external resistance R = 0.5 ohm by passing a current through it. The maximum Joulean power that can be developed across R using these batteries is

    (a) 1.28 watt

    (b) 2.0 watt

    (c)  watt

    (d) 3.2 watt
    →
    According to Coulomb’s law, the coulomb force measured between two point charges is directly proportional to:
    →

    A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be a correct statement

    (a) Resistance of each increases

    (b) Resistance of each decreases

    (c) Resistance of copper increases while that of germanium decreases

    (d) Resistance of copper decreases while that of germanium increases

    →
    Heat and work are equivalent. This means:
    1. When we supply heat to a body we do work on it.
    2. When we do work on a body we supply heat to it.
    3. The temperature of a body can be increased by doing work on it.
    4. A body kept at rest may be set into motion along a line by supplying heat to it.
    →
    Non polar molecules has:
    →

    Assertion  :   The earth’s magnetic field is due to iron present in its core.

    Reason      : At a high temperature magnet losses its magnetic property or magnetism.

    (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

    (b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

    (c) If assertion is true but reason is false.

    (d) If assertion is false but reason is true.
    →

    The current flowing in a coil of self inductance 0.4 mH is increased by 250 mA in 0.1 sec. The e.m.f. induced will be

    (a) + 1 V

    (b) – 1 V

    (c) + 1 mV

    (d) – 1 mV
    →
     A rod of length l rotates with a small but uniform angular velocity $\omega$ about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The potential difference between the centre of the rod and an end is:

    1. $\text{zero}$

    2. $\frac{1}{8}\omega\text{Bl}^2$

    3. $\frac{1}{2}\omega\text{Bl}^2$

    4. $\text{B}\omega\text{l}^2$ 

    →
    When moving electron comes closer to other stationary electron, then its kinetic energy and potential energy respectively _____ and _____.
    →

    In Young's double slit experiment, white light is used. The separation between the slits is b. The screen is at a distance d (d>> b) from the slits. Some wavelengths are missing exactly in front of one slit. These wavelengths are

    (a) λ =                                             

    (b) λ =

    (c) λ =

    (d) a, b
    →