Question

(a) What is the angle of refraction, that describes the light ray after it enters the glass from above? (Enter your answer in degrees to at least 2 decimal places.) (b) with what angle of incidence, y, does the ray approach the interface at the bottom of the glass? (Enter your answer in degrees to at least 2 decimal places.) (c) with what angle of refraction, does the ray emerge from the bottom of the glass? (Enter your answer in degrees to at least 1 decimal place.) (d) The distance d separates the twice-bent ray from the path it would have taken without the glass in the way. What is this distance (in cm)? cm (e) At what speed (in m/s) does the light travel within the glass? How many nanoseconds does the light take to pass through the glass along the angled path shown here? (9) is the travel time through the slab affected by the angle of incidence (and if so, how)? Yes, a slightly larger angle will decrease the travel time. • Yes, a slightly larger angle will increase the travel time No, the time taken for the light to traverse the slab is independent of incidence angle

Answer 1

sole! - tot 200 Eu Here o = 370 na 21:57 Ut = 2:00 am 1.57 (2) From snell's low ina na sin 02 g 7) Sin 37° = (157) Einez => 0x = sin( 0:6018) - 22:540 b) 03 is equal to Oz so, O₂ = 221540 e) On is equal to or so, da z 370 d) The ray bent from its path a de Ensino [~ Esp = 2x Sin 37°/- Cos2370 Y (ug - sina) 12 I {(1.572_sin 2 3 7 0 3 2

1 rid: 2 x 0.6018xPic 0.7986 791203611- 0.7986 XL" - (2.4649–0.3622)%2] 1:20341- 973067 ► d 21.2036X0°4492 : 04550:5407 = 0.54 Com. (@) we know, ng = º ;) Vecg ng 2 31188 = 1.91X108 m/s (f time taken to travel the light in glass, tales / 7 to 2010 mai siguins = 11•33x10795 11:33 ns ( yes, a slightly larger angle will increase the travel time.