Pendulum L = 100.0cm, find the time for 20 oscillations. Repeat the experiment for L = 80.0, 60.0, 50.0,40.0 and 30.0. Question
1) Plot a graph of L against T^2 and determine the slope.
2)plot a graph of log L against log T and measure the slope.
3) make L the subject of the
formula in T = 2π√L/g when g/4π^2 is the shape of graph in (L),find (g).
4)state 3 precautions taken in the experiment.

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?