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Wave Optics Test - 4

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Wave Optics Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0

    The propagation of light is best described by-

    Solution

    According to Maxwell's Electromagnetic theory of light, Light is an electromagnetic wave and it has a dual nature i.e it has both wave nature and particulate nature.

  • Question 2
    1 / -0

    Two waves of same intensity produce interference. If intensity at maximum is 4I, then intensity at the minimum will be

    Solution

    I1 = I2 = I = a2 
    Imax. = (a + a)2 + (2a)2 = 4a2 = 4I
    Imin. = (a - a)2 = 0

  • Question 3
    1 / -0

    First diffraction minima due to a single slit of width 1.0 x 10–5 cm is at 300. Then wavelength of light used is

    Solution

  • Question 4
    1 / -0
    When light passes from one medium to another, which of the following does not change?
  • Question 5
    1 / -0

    wave front is

    Solution

    a locus of points, which oscillate in phase is called a wavefront; thus a wavefront is defined as a surface of constant phase. The speed with which the wavefront moves outwards from the source is called the speed of the wave.

  • Question 6
    1 / -0
    In refraction, light waves bend on passing from one medium to the second medium because in the second medium,
  • Question 7
    1 / -0

    Emission and absorption is best described by-

    Solution

    Emission and absorption is best described by a particle model.

  • Question 8
    1 / -0
    Light is a form of
  • Question 9
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    The unit of luminous intensity is
  • Question 10
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    Fraunhofer spectrum is a
  • Question 11
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    A Young's double slit experiment uses a monochromatic source. What will be the shape of the interference fringes on the screen?
  • Question 12
    1 / -0
    Ratio of intensities of two waves are given by 4 : 1. The ratio of the amplitudes of the two waves is
  • Question 13
    1 / -0
    Which of the following pairs can produce erect, diminished and virtual image?
  • Question 14
    1 / -0
    Velocity of light in diamond, glass and water decreases in which of the following orders?
  • Question 15
    1 / -0
    Light of wavelength  in air has a wavelength of __________ in water. ()
  • Question 16
    1 / -0
    Some automobiles have additional yellow headlights. This is because
  • Question 17
    1 / -0
    Davisson and Germer experiment proved
  • Question 18
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    Two sources of light are said to be coherent if the waves produced by them have the same
  • Question 19
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    The wavefronts of light coming from a distant source of unknown shape are nearly
  • Question 20
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    A wavefront is an imaginary surface where
  • Question 21
    1 / -0

    Is light a particle or a wave?

    Solution

    Light is an electro magnetic wave, it has dual nature and behave as both particle and wave

  • Question 22
    1 / -0

    A ray is an imaginary

    Solution

    the direction or path along which,light energy travels in medium is called ray of light .
    rays are the arrows perpendicular to the wavefront in direction of propagation of a wave.

  • Question 23
    1 / -0

    A ray of unpolarised light is incident on a glass plate of refractive index 1.54 at polarising angle, then angle of refraction is

    Solution

  • Question 24
    1 / -0
    The correct arrangement of colours in the descending order of their wavelengths is
  • Question 25
    1 / -0

    A slit 5 cm wide when irradiated by waves of wavelength 10 mm results in the angular spread of the central maxima on either side of incident light by about

    Solution

    Angular spread on either side is given by 
    θ = λ/a = λ/5 radians

  • Question 26
    1 / -0
    The ability of an eye to see objects at any distance is called
  • Question 27
    1 / -0
    How are the various colours arranged in a secondary rainbow?
  • Question 28
    1 / -0

    When light is incident on a soap film of thickness 5 × 10–5 cm, wavelength reflected maximum in the visible region is 5320 Å. Refractive index of the film will be

    Solution

  • Question 29
    1 / -0
    Myopia is due to
  • Question 30
    1 / -0
    _____ was the first to attack Newton's corpuscular theory of light.
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