Ask Experts Questions for FREE Help !
Ask
    theparkranger24's Avatar
    theparkranger24 Posts: 1, Reputation: 1
    New Member
     
    #1

    Jul 30, 2013, 06:29 PM
    Chemicals visible under certain conditions?
    Okay, so I know that there are some chemicals that glow when shown under a blacklight or UV light. I am curious if there are any chemicals that are visible under other conditions?
    Such as looking at a chemical through certain filters? (such as different types of tints or whatever of glass or plastic)
    What chemicals and filters might there be that meet this criteria?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
     
    #2

    Jul 31, 2013, 01:34 PM
    The function of filter is to transmit only a narrow band of light, so unlike your first example of illuminating an object with infrared or ultrviolet light to excite it and make it glow, using a filter has no effect on the object itself. But they are useful for is filtering out the "noise" of wavelengths of light that you are not interested in observing, and that might otherwise overwhelm the specific wavelength or color that you want to observe. I can't think of any chemistry applications for this, but in astronomy filters are commonly used to enhance the detail of an imagine of a star or planet in a telescope. For example if you've seen photos of large solar flares where you see an arm of plasma arcing above the solar surface that image is taken using a hydrogen-alpha filter, whose job is to filter out all wavelengths except the wavelength of light that corresponds to a particular electron transition of a hydrogen item. Without that filter the extreme intensity of white light from the solar corona washes out the flare that you're trying to see. Another example is the ghostly green color you sometimes see in photos of nebulae - that's from using an oxygen filter, which lets through light associated with ionized oxygen atoms.

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Usb not visible on my computer but visible in device manager [ 2 Answers ]

Since 2 weeks I'm unable to view my usb derive on my computer but it isvisible in device manager tell me what can I do to access my usb derive: Mad:

Chemicals and their ph's [ 1 Answers ]

Can you please tell me what the ph is of chlorine gas and 99% sulfur dioxide gas

Drive are not visible [ 1 Answers ]

I`m using windows 2000 and having 4 partitions(I,e. c,d,e,f).Now the problem is in My Computer I`m not able to access c: and F: drives and these two drives are not visible also.I tried using general and safe mode.but no use.I am having avg 8.0.while scanning it detects all those drives.Please tell...

Lan is not visible [ 2 Answers ]

Hi, In my PC LAN is not visible. When I right click on my network places it shows only make new connection but it doesn't show the LAN. What could be the problem. Please reply asap. Babu

My Computer not visible [ 4 Answers ]

My 10 year-old son has done something to his PC. Now My Computer is gone from the desktop and nothing shows up when I click on it in Windows Explorer. How can I get My Computer back?


View more questions Search