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AP Intermediate 2nd Year Wave Optics — practice questions — page 3

Explore 71 free Wave Optics questions in AP Intermediate 2nd Year Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Wave Optics questions and exercises with answers

Showing questions 61–71 of 71.

Sort by phase behaviourRead the answer and worked solution →Light passes from air to glass ($n = 1.5$). Brewster's angle is:Read the answer and worked solution →HUYGENS' PRINCIPLE states that every point on a wavefront acts as a:Read the answer and worked solution →NEET · Physics · Interference or DiffractionRead the answer and worked solution →BREWSTER'S LAW for the polarising angle θ_B relates to the refractive index n as:Read the answer and worked solution →In single-slit diffraction, the central maximum is:Read the answer and worked solution →In Young's experiment, a BRIGHT fringe (constructive interference) requires path difference = ?Read the answer and worked solution →In Young's double-slit experiment, the fringe width β is given by:Read the answer and worked solution →The resolving power (RP) of a diffraction grating with N slits in the m-th order is:Read the answer and worked solution →The motional EMF induced in a conductor of length $\ell$ moving with velocity $v$ perpendicular to a uniform magnetic field $B$ is:Read the answer and worked solution →Polarisation of light is direct experimental evidence that light is a:Read the answer and worked solution →

Worked practice questions

Sort by phase behaviour

Read exercise and reference answers
Items
  1. Category
    In phase
    Item
    A resistor
  2. Category
    In phase
    Item
    Pure resistance
  3. Category
    Current lags
    Item
    An inductor
  4. Category
    Current lags
    Item
    A coil
  5. Category
    Current leads
    Item
    A capacitor
  6. Category
    Current leads
    Item
    A charged plate
Categories
  1. In phase
  2. Current lags
  3. Current leads
Instructions
Send each element down the chute of what it does to the phase.
_Source: syllabus Physics Part I, Ch 7 'Alternating Current'_

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Light passes from air to glass ($n = 1.5$). Brewster's angle is:

  1. $30^\circ$, half the right angle on the boundary
  2. $45^\circ$, the diagonal angle for any clear glass
  3. $56.3^\circ$, since $\tan\theta_B = n = 1.5$
  4. $60^\circ$, twice the standard small angle here
Show answer and solution

Correct answer: C. $56.3^\circ$, since $\tan\theta_B = n = 1.5$

$\tan\theta_B = 1.5$, $\theta_B = \tan^{-1}(1.5) \approx 56.3^\circ$.

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HUYGENS' PRINCIPLE states that every point on a wavefront acts as a:

  1. Source of secondary spherical wavelets
  2. Reflector of all incident wave energy
  3. Polariser of the incident wave
  4. Absorber of half the wave energy
Show answer and solution

Correct answer: A. Source of secondary spherical wavelets

**Huygens' principle:** every point on a wavefront is a source of SECONDARY SPHERICAL WAVELETS. The new wavefront is the envelope of these wavelets. Used to derive Snell's law and reflection.

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More Physics topics

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