1. To investigate the variation of intensity with tilt

2. Sun Earth Moon

3. Method 1. Attach the graph paper to the piece of cardboard and hold the piece of cardboard perpendicular to the floor. 2. Wrap a sheet of paper around the torch so that a circular spot is illuminated on the graph paper. 3. Making sure that the torch is parallel to the floor, shine it directly onto the graph paper. Trace the outline of the torch ’ s beam on the graph paper. 4. Repeat this procedure keeping the same distance from the paper to the torch but with the paper held at different angles to the horizontal.

4. Method continued… 5. Calculate the area illuminated by counting the squares on the graph paper.

5. Conclusions What is the relationship with intensity and tilt? Write an explanation showing how this experiment helps us to understand the seasons.