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Interference and Young's Double Slit Experiment for GUJCET: 36 solved questions

Real GUJCET paper questions on interference and young's double slit experiment, part of wave optics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2026. No sign-in needed to read them.

What this topic asks

• Fringe width and fringe position — 20 questions
• Intensity and coherent sources — 12 questions
• Slabs, media and modified set-ups — 4 questions

All 36 questions with solutions

• Two waves coming from two coherent sources of different intensities interfere. The ratio of the maximum inten… GUJCET 2007
• In Young's experiment the distance between the two slits is halved and the distance between the screen and th… GUJCET 2008
• The ratio of the intensities of two waves is 9:1. The ratio of their amplitudes is GUJCET 2008
• In Young's double slit experiment the distance between the two slits is 0.28 mm and the distance between the… GUJCET 2009
• A Young's double slit set-up for interference is shifted from air to inside water. The fringe width then GUJCET 2011
• Two beams of light of intensities I₁ and I₂ interfere to give an interference pattern. If the ratio of the ma… GUJCET 2013
• In Young's double slit experiment the width of the fourth bright fringe is 2×10⁻² cm. The width of the sixth… GUJCET 2014
• In Young's double slit experiment the distance between the two slits is equal to the wavelength of the light… GUJCET 2017
• Which of the following is wrong for interference fringes? GUJCET 2018
• In Young's experiment the fourth bright fringe produced by light of wavelength 5000 A falls on the fifth brig… GUJCET 2019
• The distance between two slits is 3 mm and the screen is placed 2 m away. When blue-green light of wavelength… GUJCET 2020
• Light of wavelength 500 nm is used in a Young's double slit experiment. The distance between the slits and th… GUJCET 2021
• Two slits are made 3 mm apart and the screen is placed 2 m away. What is the fringe separation when blue-gree… GUJCET 2022
• Two slits are made 10 mm apart and the screen is placed 1.5 m away. What is the fringe separation when light… GUJCET 2023
• The central fringe of the interference pattern produced by light of wavelength 6000 A is shifted to the posit… GUJCET 2013
• In a Young's double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away.… GUJCET 2024
• Two waves of same intensity I₀ emitted from two sources having same phase difference (φ). Due to superpositio… GUJCET 2025
• In Young's double slit experiment, the slits are separated by 0.54 mm and the screen is placed 1.8 m away. Th… GUJCET 2025
• In a Young’s double slit experiment, the slits are separated by 0.2 mm and screen is placed 2.0 m away. The d… GUJCET 2026
• In Young's experiment, if the distance between the two slits is doubled then the width of the fringes will be GSEB Board March 2016
• For coherent sources of light, their . GSEB Board March 2016
• In Young's experiment the distance between the two slits is halved and the distance between the screen and th… GSEB Board July 2016
• A plate of refractive index 1.5 is placed in the path of one of the two rays in Young's experiment. If the ce… GSEB Board July 2017
• The distance between the two slits in Young's experiment is 0.2 mm. If the wavelength of the light used is 50… GSEB Board July 2018
• The distance between the two slits in Young's experiment is 0.2 mm. If the wavelength of the light is 5000 A,… GSEB Board March 2019
• In a Young's double-slit experiment the width of the source slit is increased. Then GSEB Board March 2020
• In Young's experiment, two coherent sources are obtained by the method of division of GSEB Board March 2020 (old course)
• In Young's double slit experiment, as the width of the source slit is increased, GSEB Board July 2021
• In a two-slit experiment the screen is placed one metre away. When light of wavelength 500 nm is used the fri… GSEB Board July 2021
• If the phase difference between two waves is 6π radian, then the corresponding path difference is GSEB Board July 2021
• The intensity of the resultant wave obtained by the superposition of two waves is the amplitude of the result… GSEB Board July 2021
• If the phase difference between the two waves producing interference is 13π rad, then order interference occu… GSEB Board July 2022
• In Young's double slit experiment the distance between the two slits is 0.2 mm and the distance between the s… GSEB Board March 2023
• In Young's experiment the distance between the two slits is 0.4 cm and the distance of the screen from the sl… RS Academy GUJCET booklet
• The distance between the two slits in Young's experiment is 0.1 mm and the distance of the screen from the sl… RS Academy GUJCET booklet
• In Young's experiment transparent thin sheets are placed in front of the two slits, so that the central brigh… RS Academy GUJCET booklet