Doppler Shift: What Is It?

<p>Now, I am going to assume that 95% of the people who are reading this are not astronomy geeks. I bet that 30% of the people reading this are also not experts in optics. Am I right ? So, for the sake of those 95% and 30% people, let me start from the basics.</p> <h1>What is a spectrum of light?</h1> <p>When light passes through a glass prism, or any similar refracting surface, it splits into its constituent colours (Red, orange, yellow, green, blue, indigo &amp; violet). This is called the spectrum of light. In a spectrum of light, the red colour has the highest wavelength &amp; lowest frequency, and the violet colour has the lowest wavelength &amp; the highest frequency.</p> <p><a href="https://medium.com/long-sweet-valuable/doppler-shift-what-is-it-b74162a2e467"><strong>Website</strong></a></p>