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10 Question-Answer on Diffraction of light 1.        What will be the angle of diffraction for first secondary maximum due to diffraction at a single slit of width 0.55 mm, using light of wavelength 550 nm. (a)     00.0015 rad (b)    0.00015 rad (c)     0.003 rad (d)    0.0010 rad. Ans: (a) 2.        The bending of beam of light around corners of obstacles is called: (a)     Reflection (b)    Diffraction (c)     Refraction (d)    Interference Ans: (b) 3.          To observe diffraction, the size of an aperture (a)     Should be of the same order as wavelength (b)    Should be much larger than the wavelength (c)     Have no relation to wavelength (d)    Should be exactly λ/2. Ans: (a) 4.     ...