A Color You Can't See

Use your cell phone to see a color you can't see.

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Hanson5 wrote on Tue, 04/15/2014 - 11:13:

HI, Mr. Krampf I was wondering... is there a way that you could see infrared or ultraviolate if you recorded a rainbow with your camera? can you do a video on infrared and ultraviolate? like why cant you see them and stuff. if you have already done one can you please send me a link so I can see it.


rkrampf wrote on Wed, 04/23/2014 - 01:10:

Our eyes do not have receptors for infrared or ultraviolet, so we don't see them. Most digital cameras can detect some infrared light. Try watching this video: http://thehappyscientist.com/science-video/color-you-cant-see

Hanson5 wrote on Fri, 04/11/2014 - 10:14:

Hi, Mr. Krampf I was wondering is there a way you can see ultra violate and infrared light? Do you have a video or written text about it? if so can you please send me a link.o-_-o

J_sparkle27 wrote on Thu, 11/14/2013 - 14:59:

Hi, Mr. Krampf, I was wondering if all kinds of remotes do this, because it seems like that is an apple remote. Btw I have watched all( literally, all) of ur videos and I think they are so cool, I am using some of them for subjects in essays!! ;) Jane, Age 11

Singinggirl wrote on Mon, 09/23/2013 - 10:47:

That is CRAZY! I took a video of it with my mom's camera. I looked at the screen, rapidly flashing purple light. I look at the remote, nothing!! Thanks Mr. Krampf! I will DEFINITELY show my friends! Best science experiment EVERRRRR!!!!!

:D :D :D :D

elenaames wrote on Wed, 07/31/2013 - 10:06:

I just tried it with my IPod touch and it is so cool! I never knew that! my mom thought it was interesting too!

elenaames wrote on Wed, 07/31/2013 - 10:00:

That's so cool!! I'm so going to share that with my family and my friends. They will flip! Thanks! =)

brevard wrote on Thu, 03/07/2013 - 14:17:

that is the best expirement EVER!!!

hillsboroughmiddle wrote on Sat, 09/15/2012 - 15:46:


floma wrote on Wed, 04/18/2012 - 08:40:

I saw the lights without a cell phone!

elenaames wrote on Thu, 08/01/2013 - 15:47:

Hi floma, how could you see the light without a cell phone? I'm saying floma because that's the person who wrote the note that I have a question for. Get back to me soon! Thanks! Elena, age 11

floma wrote on Mon, 04/16/2012 - 14:14:

Do all remotes do this?

rkrampf wrote on Mon, 04/16/2012 - 16:01:

Not all of them. Some remotes, especially remote controls for gates, garage doors, car door remotes, and other outside sensors usually use radio signals instead of infrared light.

lilhoms4 wrote on Tue, 02/28/2012 - 16:08:

I never knew that!

junghae wrote on Sat, 02/25/2012 - 22:45:

That was soooo awesome! I will try it.

Ms. Meow wrote on Mon, 11/28/2011 - 12:56:

cool!i just got my cell yesterday and i will try it!!

2doodles wrote on Fri, 11/11/2011 - 17:26:

I Never knew that, really cool video!

elenaames wrote on Wed, 07/31/2013 - 10:02:

me neither! totally agree with you...AWESOME VIDEO!!!

matzewolf wrote on Fri, 11/11/2011 - 14:58:

I really like this video. I took many pictures. I thought the light was red but i was wrong. This is my favorite video other then scaring salt.

budgysmom wrote on Wed, 11/02/2011 - 13:24:

Did you know that ultraviolet light is harmful to your eyes and body? Once again, please don't send me an email, just reply on here.

rkrampf wrote on Wed, 11/02/2011 - 19:22:

Yes, ultraviolet light can be harmful if you are exposed to too much. That is what gives you a sunburn, and the cause of snow blindness.

morescience wrote on Fri, 09/02/2011 - 17:22:

i always wondered about that little light bulb on my remote. Now i know. thanks

lufamily99 wrote on Sat, 08/27/2011 - 23:27:

Some remote controls show red lights. I saw something like that once

brevard wrote on Wed, 09/15/2010 - 19:45:

i will show my friends!!!!!!!!!!!!!!

rgajaraju wrote on Thu, 07/29/2010 - 07:38:

This is the first time I knew how to see the light from a remote control. Very informative for me.

Anonymous wrote on Thu, 07/08/2010 - 17:08:

I joined this site for my kids benefit, but I'm learning so much too :) I would always comment "I don't know how this remote is working but it is and I'm not complaining" :p thanks for explaining it so simply!

Anonymous wrote on Fri, 04/16/2010 - 16:09:

good job man

rkrampf wrote on Sun, 11/22/2009 - 11:42:

Good point, and a great subject for a future video. Light waves and radio waves are a part of the same electromagnetic spectrum, although most sources that I found limit the use of the word "light" to the part of that spectrum that can be seen by human eyes or the eyes of other creatures. Thanks!

Anonymous wrote on Sun, 11/22/2009 - 10:38:

It might have been worth pointing out that radio waves are light waves too. You made it sound like radio waves were something else entirely.