ECAT Physics MCQS Physical Optics Online Test 1

a-diffraction-grating-has-500-lines-per-mm-its-spacing-or-grating-element-will-be-equal-to-3-a_-_2-c-3-97-10-3-csup-3-e-3-3-c-2-fsup-3-e-mm,a-glass-grating-has-5000-lines-2-fcm-then-grating-element-will-be-3-a_-_5-c-282-09-imes-10-5-e-7-b-6-7-d-5-c-2-cm-5-c-29,a-light-ray-travelling-from-rare-to-denser-medium-suffer-a-phase-change-of-3-a_-_180-3-csup-3-eo-3-c-2-fsup-3-e,a-ray-of-light-26-nbsp-3-bshows-the-direction-of-propagation-of-light-it-is-line-which-is-3-a_-_normal-to-the-wavefront,a-typical-diffraction-grating-has-certain-number-of-lines-per-centimeter-whose-range-is-3-a_-_400-to-5000,according-to-hygen-e-2-80-99-s-principle-2-c-each-point-on-a-wave-front-acts-as-a-source-of-3-a_-_secondary-wavelet,an-oil-film-on-water-surface-shows-colour-due-to-3-a_-_interference,angle-between-ray-of-light-and-wave-front-is-3-a_-_5-c-2890-5-eo-5-c-29,angle-between-ray-of-light-and-wave-front-is-3-a_-_90-c-2-b-0,bending-of-light-around-the-edges-of-an-obstacle-is-called-3-a_-_diffraction,bragg-e-2-80-99-s-equation-is-3-a_-_5-c-28-d-5-csin-5-c-2-c-09-heta-3-dn-7-b-5-clambda-5-cover-2-7-d-5-c-29,e-2-80-9-c-the-light-energy-travels-in-space-as-waves-e-2-80-9-d-was-firstly-proposed-by-3-a_-_huygen,example-of-a-thin-film-is-3-a_-_soap-bubble,for-which-of-the-following-colours-will-the-fringe-width-be-minimum-in-the-double-slit-experiment-3-a_-_violet,fringe-spacing-in-young-e-2-80-99-s-double-slit-experiment-increases-due-to-increase-in-3-a_-_wavelength,fringe-spacing-is-equal-to-3-a_-_5-c-28-0-crac-7-bm-5-clambda-l-7-d-7-bd-7-d-5-c-29,fringe-spacing-is-inversely-proportional-to-3-a_-_slit-separation,huygen-27-s-principle-is-used-to-3-a_-_locate-the-wave-front,huygen-e-2-80-99-s-principle-is-used-to-3-a_-_locate-the-wave-front,if-blue-light-is-used-as-compare-to-red-light-then-fringe-spacing-3-a_-_decreases,the-phenomenon-of-polarization-of-light-reveals-that-sun-light-is-3-a_-_transverse-wave,to-distinguish-between-transverse-and-longitudinal-wave-2-c-is-used_-_polarization,when-26-nbsp-3-blight-ray-travels-from-one-medium-to-another-2-c-the-characteristic-which-does-not-change-is-3-f_-_frequency,when-one-mirror-of-a-michelson-interferometer-is-moved-a-distance-of-0-5-mm-2-c-2000-fringes-are-observed-the-wavelength-of-light-used-is-3-a_-_5-c-285000-a-5-eo-5-c-29,which-one-of-the-following-can-not-be-polarized-3-f_-_sound-waves