Infrared Principles

Multiple Choice

Infrared falls between _____ and _____.

• ultraviolet, visible

• radio, microwave

• microwave, visible

• x-ray, gamma

Multiple Choice

Infrared can be subdivided into three ranges. Which one is closest on the EM spectrum to microwaves?

• intermediate

• far

• near

• none of the above. IR isn't next to microwaves, silly

Multiple Choice

Which IR range measures 1.5 to 5.6 microns?

• intermediate

• far

• near

• none of the above, it's 1.5 to 6.5 microns anyway

Draw

Draw the symbol for micron.

Poll

Absolute Zero exists IRL (in real life).

• True; it's somewhere on this planet

• True; it's somewhere in the universe

• True; it has been scientifically created

• False; all cap

Multiple Choice

Of the following items, _____ has the highest emissivity factor.

• me, after getting radiated by my ex-wingman

• the transmitter that radiated me

• the window that my ex-wingman opens to let me know (too late) that they're radiating

• the red-hot poker i plan to use to persuade them (respectfully) not to do it again

Open Ended

You're hiking the Grand Canyon and you spot a homie on the other side of the chasm. You yell at them to get their attention. How would attenuation affect your ability to reach them?

Multiple Choice

Thermal crossover is...

• a point at which land temp = water temp

• a point at which land temp = body temp

• a sick move by Kyrie Irving where he collects your ankles like they're Pokemon

• A and B, though technically B is not liable to occur because there's too much temp variation within the body

Draw

You suddenly find yourself with the ability to see IR. Your first order of business is to catch that pesky neighbor's cat that you swear is behind all the recent chewed electric lines in your yard. Which type of IR source will likely cause you the most annoyance as you search your yard?

Multiple Choice

The Northern Lights would be an example of _____.

• artificial background IR

• natural background IR

• atmospheric background IR

• radiation background IR