Question

Which of the following did Christian Doppler explain? A. Atmospheric changes that affect climate B. The transfer of electricity through solids C. The changing colors of binary stars D. The radioactivity of certain elements

Answer 1

The correct option is c

Step-by-step explanation:

Christian Doppler is known for his principles in waves known as the doppler effect. This principle states that the change in frequency of a wave is caused by the distance between the source (of the wave) and the observer of the wave. He then proceeded to explain the concept of changing colors of binary stars with this principle.