In Young's double-slit experiment, fringe spacing increases if _.
Correct answer: A. Red light is used as compared to blue light
- A. Red light is used as compared to blue light
- B. X-ray is used as compared to blue light
- C. Violet light is used as compared to blue light
- D. Ultraviolet light is used as compared to blue light
Explanation
Fringe spacing is directly related to wavelength (because as the wavelength increases the angle of diffraction increases).Red light has the highest wavelength range i.e 650-700 so the angle of diffraction will be higher and fringe spacing will increase, as compared to blue which has a wavelength range of 460-500, and X-rays which have a wavelength range of 10^-10 to 10^-9.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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