1) The defects in the images caused by mono-chromatic light are called a) seidal aberrations b) distortion c) coma d) chromatic aberrations 2) what is this lens called a) chromatic b) biconvex c) biconcave d) achromatic doublet 3) What is the angle of prism in FRESNEL BIPRISM ? a) 0.5º b) 1º c) 1.5º d) 2º 4) Colours in thin films are caused due to the interference of a) wavefronts b) wavelets c) wave trains d) waves 5) What is this instrument called a) michelson interferometer b) michelson polarimeter c) michelson viscometer d) michelson light measuring meter 6) In Younge's double slit experiment we can study a) polorisation b) diffraction c) interference d) refraction 7) Name the instrument a) polaroid b) grating c) seperator d) prism 8) Number of lines in diffraction grating are a) 15500 lines/mm b) 15000 lines/m c) 15000 lines/cm d) 15000 lines/inch 9) grating element is denoted by a) e + a b) e + d c) e + b d) e + c 10) This is called a) zone plate b) newton rings c) refraction plate d) reflection plate 11) I ɵ ∝ cos 2 ɵ this equation represents a) malus law b) gauss law c) kirchoff's law d) newton law 12) This arrangement is called a) newton plates b) pile of plates c) nicol plates d) zone plates 13) The ratio of Helium and Neon gases in He-Ne Laser is a) 1 : 10 b) 1 : 5 c) 10 : 1 d) 10 : 5 14) what is this OFC called a) Step index b) Multiple index c) Multiple graded index d) Multiple step index 15) HOLOGRAPHY was first introduced by a) Gamow b) Gyer c) Gabor d) Gummer

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