Question

10. In Young's double-slit apparatus the slits are senerated by a distance of 0.55 x 10 m. A screen 15 located 4 m from the plane of the slits. When light of wavelength 550 nm illuminates the slits, the distance on the screen between the central bright fringe and the third bright fringe on either side is a 4x 10mb. 8x 10-m c. 12 x 10 m d 16x 10-me. 32 x 10 m White light from source is normally incident upon diffraction grating G. In the first order spectrum the lines 1,2,3 might represent respectively the colors a. Red, green, blue . Blue, red, green e . Green, red, blue b. Red, blue, green d. Blue, green, red 12. The light exiting two adjacent narrow slits is both coherent and in phase. The difference in distance between a point at the center of the first-order maximum and each of these slits is equal to a. 0 b. o N d. 24 c. Not here 13. The distance between the central maximum and the fifth maximum from it for a double slit pattem is 10 mm on a screen 50 cm from the slits. If the wavelength is 500 nm the slit separation is a 1.25 x 10-m c. 3.50 x 10- 4m c . 7.25 x 10 m b. 2.00 x 10-m d. 5.50 x 10 m 14. In a Young's double-slit experiment, if the distance L between the pair of sources and the screen is increased, the fringe width a. Increases d. Increases and then decreases b. Decreases e. Decreases and then increases c. Remains the same 15. In a Young's double-slit experiment, if the distance between the source and the screen is increased, the angular width of any fringe a. Increases Increases and then decreases b. Decreases e Decreases and then increases c. Remains the same 16. In a single-slit diffraction experiment, the slit width is twice as much as the wavelength of monochromatic light used (w - 22.). The angular width of the central maximum must be a. 30° b. 60°c 90d 120 e 180°

can somebody please help me with these questions, thank you very much

Answer 1

o d - 0.55X10-3 - 550x10 m De 4m Distance of third bright fringe from Central bright fringe is x=nAD en d x = 3 x 550x10-9x4 0.55810-3 x = 12 x 103 m option © is Correct.