Si se dispone de una balanza y de un dinamometro muy sensibles y que con aquella se mide la masa de un objeto de 25 kg en la tierra. Que señalarán la balanza y el dinamómetro si la medida se efectúa a 2000 m de altitud sobre la superficie de la tierra?

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?