1) The frequency of a wave is _______ ____ the frequency of its source. a) less than b) equal to c) greater than 2) The energy of a wave depends on the waves? (classical) a) amplitude b) wavelength c) frequency 3) Which experiment proved that light had to be a type of wave? a) the photoelectric effect b) prism dispering a rainbow c) interference patterns through slits d) alpha particles through gold foil 4) If two sources are coherent then which of the following do they NOT have in common? a) their wavelength b) their frequency c) their amplitude d) their phase e) none of the above 5) When two sets of wave meet they combine. When sets of wave meet in phase they interfere... a) constructively b) deconstructively c) in other peoples' business 6) When waves constructively interfere from coherent sources there is a path difference of 4cm at the 2nd order maxima. What must the wavelength of the wave be? a) 8cm b) 6cm c) 4cm d) 2cm e) 1cm f) 0.5cm 7) Which of these gives the appoximate wavelength of red, green and blue light repectively? a) 540nm, 490nm, 700nm, b) 700nm, 540nm, 490nm c) 490nm, 540nm, 700nm 8) When a white light source is shone through a diffration grating onto a screen, what is observed at the central maximum? a) White light b) a rainbow with red closest to the center c) a rainbow with blue violet closest to the centre 9) When a white light source is shone through a diffration grating onto a screen, what is observed at the 1st order maxima? a) White light b) a rainbow with red closest to the central maximum c) a rainbow with blue closest to the central maximum 10) In a prism white light is split using refraction. Which is deviated the least out of the colours listed? a) yellow b) green c) blue d) indigo e) violet 11) To measure the absolute refractive index of a material you would need the angle of refraction and incidence with light travelling from a) the material into a vacuum b) the material into air c) the air into the material d) a vacuum into the material 12) What is the name given to the angle in which greater than it total internal reflection will occur? a) the refracted angle b) the critical angle c) the incident angle d) the right angle 13) When light travels from a less dense medium into a more dense medium what happens to its frequency ? a) frequency increases b) frequency decreases c) frequency stays the same 14) when light travels from a less dense medium into a more dense medium what happens to its velocity ? a) it increases b) it decreases c) it stays the same 15) When light travels from a less dense medium into a more dense medium what happens to its wavelegth ? a) it increases b) it decreases c) it stays the same

Higher Unit 3 revision

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