हिंदी

State any four conditions for obtaining well defined and steady interference patterns.

Advertisements
Advertisements

प्रश्न

State any four conditions for obtaining well defined and steady interference patterns.

State the conditions for a steady interference pattern.

लघु उत्तरीय
Advertisements

उत्तर

  1. The two sources of light must be coherent.
  2. The two sources of light must be monochromatic.
  3. The two interfering waves must have the same amplitude.
  4. The two slits should be narrow.
  5. The two waves should be in the same state of polarization. 
  6. The two light sources should be closely spaced and the distance between the screen and the sources should be large.
shaalaa.com

Notes

Students should refer to the answer according to their question.

  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Wave Optics - Short Answer I

संबंधित प्रश्न

Draw the sketches to differentiate between plane wavefront and spherical wavefront.


Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) reflected and (b) refracted light? Refractive index of water is 1.33.


The wavelength of light in a medium is \[\lambda = \lambda_0 /\mu,\] where \[\lambda \] is the wavelength in vacuum. A beam of red light \[\left( \lambda_0 = 720\text{ nm} \right)\] enters water. The wavelength in water is \[\lambda =  \lambda_0 /\mu = 540\text{ nm.}\] To a person under water, does this light appear green?


Is it necessary to have two waves of equal intensity to study interference pattern? Will there be an effect on clarity if the waves have unequal intensity?


The equation of a light wave is written as \[y = A \sin\left( kx - \omega t \right).\] Here, `y` represents _______ .


An amplitude modulated (AM) radio wave bends appreciably round the corners of a 1 m × 1 m board but a frequency modulated (FM) wave only bends negligibly. If the average wavelengths of the AM and FM waves are \[\lambda_a   and   \lambda_f,\]


The inverse square law of intensity \[\left(\text{i.e. the intensity }\infty \frac{1}{r^2}\right)\] is valid for a ____________ .


Three observers A, B and C measure the speed of light coming from a source to be νA, νBand νC. A moves towards the source and C moves away from the source at the same speed. B remains stationary. The surrounding space is water everywhere.

(a) \[\nu_A  >  \nu_B  >  \nu_C\]

(b) \[\nu_A  <  \nu_B  <  \nu_C\]

(c) \[\nu_A  =  \nu_B  =  \nu_C\]

(d) \[\nu_B  = \frac{1}{2}\left( \nu_A + \nu_C \right)\]


The wavelength of sodium light in air is 589 nm. (a) Find its frequency in air. (b) Find its wavelength in water (refractive index = 1.33). (c) Find its frequency in water. (d) Find its speed in water.


The speed of yellow light in a certain liquid is 2.4 × 108 m s−1. Find the refractive index of the liquid.


Two narrow slits emitting light in phase are separated by a distance of 1⋅0 cm. The wavelength of the light is \[5 \cdot 0 \times  {10}^{- 7} m.\] The interference pattern is observed on a screen placed at a distance of 1.0 m. (a) Find the separation between consecutive maxima. Can you expect to distinguish between these maxima? (b) Find the separation between the sources which will give a separation of 1.0 mm between consecutive maxima.


Plane microwaves are incident on a long slit of width 5.0 cm. Calculate the wavelength of the microwaves if the first diffraction minimum is formed at θ = 30°.


Monochromatic electromagnetic radiation from a distant source passes through a slit. The diffraction pattern is observed on a screen 2.50 m from the slit. If the width of the central maximum is 6.00 mm, what is the slit width if the wavelength is
(a) 500 nm (visible light)
(b) 50 µm (infrared radiation)
(c) 0.500 nm (X rays)?


Light follows wave nature because ______ 


Young’s double-slit experiment is carried out using green, red and blue light, one colour at a time. The fringe widths recorded are WG, WR, and WB respectively then ______ 


The path difference between two waves meeting at a point is (11/4)λ. The phase difference between the two waves is ______


Emission and absorption is best described by ______.


A ray is an imaginary line ______.


Light appears to travel in straight lines since


Light emerges out of a convex lens when a source of light kept at its focus. The shape of wavefront of the light is ______.


According to the wave theory proposed by Christian Huygens, how does light propagate?


In what year did Thomas Young perform the interference experiment?


What did Maxwell's explanation remove the need for in the propagation of light?


Which approximation is the basis of geometrical optics?


Which set of topics is included in wave optics?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×