please answer 3 and 4 please Sending a white light beam into a prism, you see a

Question

please answer 3 and 4 please

Sending a white light beam into a prism, you see a colorful rainbow-like pattern because of Diffraction Dispersion Superposition Interference A distant car is approaching you at night. Assuming you can just barely resolve the two headlights, and that the headlights are 1.4 meters apart. Take the wavelength o f the light from the headlights as 550 nm, and the diameter of the pupil in your eye as 5 mm. So, the distance between you and the car is mostly like 10 m, 100 m 1 km 10km

Explanation / Answer

3) option B dispersion

4) angular resolution= 1.22*lambda/d

now angle between the two headlights=distance between them/distance of car from observer

==> angular resolution= 1.22*lambda/d=1.4/D

==> D=1.4*5E-3/(1.22*550E-9) =10432 m=10 Km (approx)

==> option D is correct

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