Wave Optics Huygens & YDSE Interference — Practice Questions
Free NEET Physics multiple-choice questions on Wave Optics Huygens & YDSE Interference. Attempt each question and reveal the answer with a full explanation.
In Young's Double Slit Experiment, the fringe width is found to be 0.4 mm . If the whole apparatus is immersed in water of refractive index 4/3 without disturbing the geometrical arrangement, the new fringe width will be: 0.3 mm 0.4 mm 0.53 mm 0.2 mm In Young's Double Slit Experiment, the path difference between two interfering waves at a point on the screen is 5 /2 . The point will be: Third dark fringe Second dark fringe Third bright fringe Fifth dark fringe If the wavelength of light is changed from 4000 to 6000 , the fringe width in YDSE will: Increase by 1.5 times Decrease by 1.5 times Increase by 2.25 times Remain same If the ratio of amplitudes of two waves is 4:3 , then the ratio of maximum and minimum intensities in their interference pattern will be: 49:1 16:9 7:1 25:7 In Young's double slit experiment, if the distance between the slits is halved and the distance between the slits and screen is doubled, the fringe width will: Become four times Become double Remain same Become half Two coherent sources of intensity ratio interfere. In the interference pattern, the ratio I max - I min I max + I min is equal to: 2 1+ 1+ 2 1+ 1+ 2 Light of wavelength 500 nm is used as a source in a YDSE. If the distance between the slits is 1.2 mm , the angular separation of the 10th order maxima is: 1/240 rad 1/120 rad 1/60 rad 1/24 rad In Young's double slit experiment, the intensity of light at a point on the screen where the path difference is λ is K units. What is the intensity of light at a point where the path difference is λ /3 ? K/4 K/3 K/2 K In Young's double slit experiment, if a thin mica sheet of refractive index and thickness t is introduced in the path of one of the interfering beams, the fringe pattern will: Shift by a distance ( -1)tD/d Shift by a distance ( )tD/d Increase the fringe width Not shift at all Which of the following phenomena proves the transverse nature of light? Polarization Interference Diffraction Refraction According to Huygens principle, the locus of all points vibrating in the same phase is called a: Wavefront Vibration plane Ray Harmonic The wave-front of a light beam from a distant star as it reaches the upper atmosphere of the earth is approximately: Plane Spherical Cylindrical Elliptical In the Young's double slit experiment, if the source is changed from red light to blue light: The fringes will become narrower The fringes will become wider The fringes will disappear The intensity of the central fringe will decrease The wavefront due to a point source at a very large distance from the source is: Plane Spherical Cylindrical Circular Two coherent sources of light can be obtained by: Division of wavefront Using two independent lamps Using two different colors Using two sodium lamps For destructive interference, the phase difference between two waves should be: (2n+1) 2n n /2 Zero For a point source of light, the shape of the wavefront at a distance r from the source is: Spherical Cylindrical Plane Elliptical