Home » News & Blogs » Prisms In The Grass Ply Secrets From The Stars
Bookmark and Share
Astro Bob

Prisms In The Grass Ply Secrets From The Stars

28 Oct 2019, 02:17 UTC
Prisms In The Grass Ply Secrets From The Stars
(200 words excerpt, click title or image to see full post)

Raindrops and prisms both are masters of light-bending. In a rainbow a beam of sunlight is bent as it enters the drop, reflects off the back of the drop and is bent a second time on exit, where it fans into a miniature rainbow. In a prism, light is bent at the front surface, starts to spread into individual colors which spread into a rainbow when they exit. Each color of light travels at a different speed through the water and glass, so each gets bent by a different amount, violet the most and red the least. This spreads the individual colors of white light apart to make a rainbow. CC BY-SA 1.0
Prisms revolutionized astronomy in the late 19th and early 20th century and yet they’ve been under our noses since humankind witnessed its first frost. A prism separates white light into the colors of the rainbow. Many of us learned the order of those colors using the acronym Roy G. Biv, which stands for red, orange, yellow, green, blue, indigo and violet. Raindrops are probably the most familiar of nature’s prisms. Each drop works by refracting or bending white light from the sun and spreading it into a ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day