What is the radiation pressure 1.2 m away from a 700 W lightbulb? Assume that the surface on which the pressure is exerted faces the bulb and is perfectly absorbing and that the bulb radiates uniformly in all directions. Number n Units v eTextbook and Media It has been proposed that a spaceship might be propelled in the solar system by radiation pressure, using a large sail made of foil. How large must the surface area of the sail be if the radiation force is to be equal in magnitude to the Sun's gravitational attraction? Assume that the mass of the ship + sail is 1700 kg, that the sail is perfectly reflecting, and that the sail is oriented perpendicular to the Sun's rays. (With a larger sail, the ship is continuously driven away from the Sun.) The rate at which the Sun emits energy is 3.90 x 1026 W. The Sun's mass is 1.99 x 1030 kg. Gravitational constant is 6.67 x 10-11 N m2/kg2. Number UnitsIn the figure, light is incident at angle 01 = 40' on a boundary between two transparent materials. Some of the light travels down through the next three layers of transparent materials, while some of it reflects upward and then escapes into the air. If n1 = 1.26, n2 = 1.36, n3 = 1.34 and n4 = 1.43, what is the value of (a) 05 and (b) 04? Air 05 ng 124 (a) 05 = Number Units (b)04 = Number i Units