Electro-magnetic Spectrum

How much do you know about astronomy?


Today we have challenging questions about light, both visible and invisible.

Please get out a clean sheet of paper and a No. 2 pencil and prepare for today’s Astronomy Challenge.

If you find a mistake, please let me know.

You have up to ten minutes to complete the challenge today.

Begin now. Do your best.

  1. Name the Scottish physicist who, in 1865, was the first to understand the saturn_1083031_Open_000nature of light as a self-sustaining EM wave?



  1. Who, in the early 20th century, revealed that when EM waves interact with matter, they do so as if composed of discrete particles, photons??


  1. Who discovered infrared radiation in 1822?

  1. Who said of light “The rays, to speak properly, are not colored”?

Screen Shot 2018-08-08 at 1.37.17 PM

  1. Name one of the physicists who completed the work of Maxwell and Einstein’s theory of quantum electrodynamics, and won the Nobel Prize in Physics in 1965?



OK, pencils down. Scroll down for directions for checking your answers.


Please read directions below:

Step 1: Please contribute to one of these charities linked below. If you are a winner and contribute, please ask recipient to notify me of the amount so I might match the first $100.

  1. Michael J. fox Foundation for Parkinson’s Research


Click on “Get Involved”


  1. Guilford County Animal Shelter


               Look under “Donate to the Animal Shelter.”

  1. Guilford Senior Resources


Look under “You Can Help”

  1. Jo Cline Memorial Endowment


Step 2: Check your written answers to the answers below. If your answer is correct, give it a check mark.

Step 3: If your answer is wrong, put a small X.

Step 4: If you think my answer is questionable, write yourself a note, do the research and let me know if I’ve erred. Thanks in advance,

You are welcome to play with us during the next live broadcast of

“Let’s talk astronomy” this coming Monday beginning at 8 am eastern US time on Periscope.

Periscope is a live video streaming app for Android and iOS available in the App Store.

On Monday, January 21, 2019, our Astronomy Challenge was about electromagnetic spectrum.

The questions are given above, the correct answers and the winners are given below.

Congratulations to all winners and thank-you to all participants.

Play the Astronomy Challenge live on Periscope’s “ Let’s talk astronomy” 8 am (Eastern US time) on Mondays.

Correct Answers……..Periscope Winners:

  1. James Clerk Maxwell………………….@CAPTAIN_DELTRON: Maxwell is also known for his ideas about the rings of Saturn.

  1. Albert Einstein…………………@Stevieray1986: Einstein may have not actually called his “cosmological constant” his greatest mistake.


  1. William Herschel…………@CAPTAIN_DELTRON: After discovering the seventh planet of our system, Herschel proposed the name “George” for the body.


  1. Sir Isaac Newton………..@rossm3838:


  1. Richard Feynman……………..@CAPTAIN_DELTRON:

Julian Schwinger………………@tiki:

Sin-Itiro Tomonaga……………No one got this name.

screen shot 2019-01-21 at 4.55.07 pm
Sin-Itrio Tomonaga



Live Periscope viewers indicated that the topic for the Astronomy Challenge on Monday, January 28 will be voyages in the solar system..

Thanks goes out to all participants,


Congratulations to everyone who got one right.


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