SIIT
a. Interference
b. Scattering
t. Diffraction
d. Dispersion
3. What principle is responsible for alternating light and dark bands when light passes through two or more
narrow slits? a. Interference
b. Scattering
C. Diffraction d. Dispersion
Answers
Ans 1 Interference is the phenomenon in which two waves superpose to form the resultant wave of the lower, higher or same amplitude. The most commonly seen interference is the optical interference or light interference. ... This means that light waves coming out of a source do not have a constant amplitude, frequency or phase.
Ans2 Diffraction of light occurs when a light wave passes by a corner or through an opening or slit that is physically the approximate size of, or even smaller than that light's wavelength. ... The parallel lines are actually diffraction patterns.
Ans 3When white light is passed through a glass prism it splits into its spectrum of colours (in order violet, indigo, blue, green, yellow, orange and red) and this process of white light splitting into its constituent colours is termed as dispersion.
Ans 4When monochromatic light passing through two narrow slits illuminates a distant screen, a characteristic pattern of bright and dark fringes is observed. This interference pattern is caused by the superposition of overlapping light waves originating from the two slits.
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