Question

1. a scientist doubles the frequency of a wave. what happens to its energy?

a) it decreases by half
b) it stays the same
c) it doubles
d) it decreases to zero

Explanation:

Step1: Recall the energy formula

The energy of a wave is given by \(E = hf\) (where \(h\) is Planck's constant and \(f\) is frequency).

Step2: Analyze the effect of doubling frequency

If the frequency \(f\) is doubled (\(f_{new}=2f\)), then the new energy \(E_{new}=h\times(2f) = 2hf\). Since the original energy \(E = hf\), the new energy is twice the original energy.

Answer:

B. It doubles