The radius of the Moon is 1.737 Mm and the distance between Earth and the Moon is 384.5 Mm. The intensity of the moonlight incident on her eye is 0.0220 W/m2. What is the intensity incident on her retina if the diameter of her pupil is 6.74 mm and the diameter of her eye is 2.03 cm?

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Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”