1) Using the distance from the Sun to the Earth in meters, calculate its brightness on the Earth in W/m^2. Use the formula Brightness= Luminosity/(Area of the Sphere)
2) Using the same method as in step 1, calculate the brightness of the Sun in Mercury.
3) Using the formula for the magnitude difference − = . (), what is the

difference of magnitudes of the Sun between the Earth and Mercury? (use the log function of your calculator).
4) Does the sun have a higher or lower apparent magnitude on the Earth than in Mercury? Explain your answer.

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?