Question

Write the differences between umbra and penumbra. [3 MARKS]

Answer 1

Each Difference: 1 Mark

$\begin{array}{cc}\text{Umbra}& \text{Penumbra}\\ \text{(1) It is the darkest region of the shadow}& \text{It is the partially shaded region which is}\text{less darker than umbra}\\ \text{(2) No light approaches this region}& \text{Some light rays reach this region}\\ \text{(3) It can be found at the centre}\text{of the shadow}& \text{It can be found in the outermost}\text{region of the shadow}\end{array}$