Definition

A change in the wavelength of light that occurs when the source of the light is moving closer, resulting in shorter wavelengths.

Example

The blueshift observed in the light from the nearby star indicates that it is moving towards us.

Conversation

Have you heard about the concept of blueshift in astronomy?

Yeah, it's when light waves get compressed, right?

Exactly! It's fascinating how it shows us the movement of stars.

I love how science can explain such amazing phenomena.

Synonyms & Antonyms

Root Explanation

Blueshift is formed from "blue" (from Old English "blǣw", meaning the color blue) and "shift" (from Old English "sciftan", meaning to divide or change). The term describes the phenomenon where light from an object is shifted towards the blue end of the spectrum, indicating that the object is moving closer to the observer.

Memory Tip

Think of the color 'blue' representing light that is 'changing' or 'shifting' towards the observer, which is what blueshift means.

Visually Confused Words