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Question C A spacecraft for extrasolar travel uses a sail to reflect light back toward the sun....

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Physics

Question C Aspacecraft for extrasolar travel uses a sail to reflect light backtoward the sun. At earth’s orbit the sunlight has an intensity of1368 W/m2. The spacecraft has a mass of 2000 kg.

a) [8]Determine the required sail to achieve an initial acceleration ofthe 9.8m/s2

b) [2] if itwere black rather than reflective what would the initialacceleration be?


Question D [8] Show that the units on the right side of eq 22-27are those expected for c



how to do question D）

（Only help me to do question D）thanks）
Question A [4 x 4 marks] Early morning sunlight passes throughpolarizing sunglasses and hits a person’s eye lid (so they are notblinded by this light)
What orientation is the electric field at the personseye?
The Poynting vector for this light is 650W/m2 West.
Find the electric field amplitude
Find the magnetic field amplitude.
Question B [ 4 x 4 marks] A photon with an energy of 10.2eV isabsorbed by a hydrogen atom traveling in the opposite directionwith a speed of 1000 m/s.
What is the energy in Joules of the photon?
What is the wavelength, frequency and speed of thephoton
What is the momentum of the photon?
What is the speed of the atom after the photon isabsorbed?

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