Self Studies
Self Studies
Self Studies
Self Studies

Wave Optics Test - 11

Result Self Studies

Wave Optics Test - 11
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0

    The superposition principle in relation to displacements produced by a number of waves refers to

    Solution

    According to superposition principle, at a particular point in the medium, the resultant displacement produced by a number of waves is the vector sum of the displacements produced by each of the waves

  • Question 2
    1 / -0

    If we have two coherent sources S1 and S2 vibrating in phase with same amplitude, then for an arbitrary point P with path difference corresponding to ϕ, the resultant intensity if the intensity due to each is I0 would be

    Solution

    I = I1 + I2 + 2√I1√I2cosϕ
    I1 = I2 = I0
    I = I0 + I0 + 2I0cosϕ
    I = 2I0 (1 + cosϕ)
    I = 4I0cos2ϕ/2

  • Question 3
    1 / -0
    A normal eye is not able to see objects closer than 25 cm because
  • Question 4
    1 / -0

    Interference effects of light from two sources can be observed if

    Solution

    If the two sources are coherent, then the phase difference φ at any point will not change with time and we will have a stable interference pattern; i.e., the positions of maxima and minima will not change with time.

  • Question 5
    1 / -0
    If the polarising angle of a piece of glass for green light is 54.74°, the angle of minimum deviation for an equilateral prism made of same glass is

    [Given : tan 54.74° = 1.414]
  • Question 6
    1 / -0

    Two sources of light are coherent if they have

    Solution

    If the two sources are coherent, then the phase difference φ at any point will not change with time

  • Question 7
    1 / -0
    The twinkling effect of starlight is due to
  • Question 8
    1 / -0
    Which type of phenomenon will occur when a ray of light falls on a transparent medium like water?
  • Question 9
    1 / -0

    According to Huygens, construction relation between old and new wave fronts is-

    Solution

    Huygens’ construction tells us that the new wavefront is the forward envelope of the secondary waves.

  • Question 10
    1 / -0
    Two waves of light are given by equations y1 = 6 cos t and y2 = 10 sin(t + ). The ratio of intensities at maxima and minima formed by superposition of these two waves is 
  • Question 11
    1 / -0

    According to Huygens principle

    Solution

    According to Huygens principle, each point of the wavefront is the source of a secondary disturbance and the wavelets emanating from these points spread out in all directions with the speed of the wave. These wavelets emanating from the wavefront are usually referred to as secondary wavelets

  • Question 12
    1 / -0
    What causes a change in the colours of soap or oil films for a given beam of light?
  • Question 13
    1 / -0
    The amount of light entering into the eye is controlled by
  • Question 14
    1 / -0
    In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9 cm. What is the actual distance of separation?
  • Question 15
    1 / -0
    Directions: In the following question, a statement of Assertion is given, followed by a corresponding statement of Reason. Read the statements and mark your answer as

    (a) if both assertion and reason are true and reason is the correct explanation of assertion
    (b) if both assertion and reason are true, but reason is not the correct explanation of assertion
    (c) if assertion is true, but reason is false
    (d) if both assertion and reason are false

    Assertion:     A red object appears dark in yellow light.
    Reason:     Red colour is scattered less.
  • Question 16
    1 / -0
    When a thin transparent plate of thickness t and refractive index m is placed in the path of one of the two interfering waves of light, then the path difference changes by
  • Question 17
    1 / -0
    A diver inside water (μ = 1.33) should see the sun set at an angle of
  • Question 18
    1 / -0

    Approximate Doppler shift formula for light is

    Solution

  • Question 19
    1 / -0

    If we have two coherent sources S1 and S2 vibrating in phase, then for an arbitrary point P constructive interference is observed whenever the path difference is

    Solution

    The two interfering wave trains reinforce each other to fulfill the condition of constructive interference.

  • Question 20
    1 / -0

    If we have two coherent sources S1 and S2 vibrating in phase, then for an arbitrary point P destructive interference is observed whenever the path difference is

    Solution

    if the point P is such that the path difference, S2P ~ S1P = (n + 1/2 ) λ (n = 0, 1, 2, 3, ...) we will have destructive interference and the resultant intensity will be zero.

  • Question 21
    1 / -0
    A ray of light passes from vacuum into a medium of refractive index µ. The angle of incidence is found to be twice the angle of refraction. Then, the angle of incidence is
  • Question 22
    1 / -0
    A blue star is 
  • Question 23
    1 / -0
    The separation between slits is halved and between screen and slits is doubled. Find the new fringe width if the original fringe width is W.
  • Question 24
    1 / -0
    Directions: The following question has four choices out of which ONLY ONE is correct.

    In order that the light reflected from the surface of a medium of refractive index µ is plane polarized, the angle of incidence should be :
  • Question 25
    1 / -0

    Relation between ray and wave front is

    Solution

    Huygens’ construction tells us that the new wavefront is the forward envelope of the secondary waves. When the speed of light is independent of direction, the secondary waves are spherical. The rays are then perpendicular to the wavefronts.

Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now