Chapter 1. Light in Astronomy

Question I radiate light?

NBes0loMSjDqKyZihg1mHw90D5wwR3MK4hKCFXGPyH8FEUd4nZCU8w4g1lAiw2pT7qc3JeylahGqfq0zMYDQU5qm8LZo4qzX5Q4/EzsnU55sJo5mgN4y+vzuVpYhw4MisW1Jk4epHrq/9uxCCasvtuS9/6X5ecLw8d/+ucJvzIwDVS5a9D4fQhOBjZ9IBb11qzu7Wqp/eQzezuLC0lKS3St0peeUpVeenuxkZQhtebRDhs4UBN7kg3nSZmlZTM74ZA8bwcA3D1Gw62YcCYKmTRTIiq5yxGXxrKu29izNIiCxZEA8DJFvI+876WAX7ij8qvgPQl2DuHPW3VZP {"title":"too hot","description":"We aren't quite hot enough to EMIT light in this region. Try again.","type":"incorrect","color":"#800000","code":"[{\"shape\":\"rect\",\"coords\":\"96,11,495,257\"}]"} {"title":"too cold","description":"We are a little too warm to EMIT light in this region. Try again.","type":"incorrect","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"96,11,495,257\"},{\"shape\":\"rect\",\"coords\":\"93,352,496,575\"}]"} {"title":"just right","description":"Objects that are a little cooler than we are, all the way up to objects that are 3000K, emit infrared light. So, even though you can't SEE the light that we emit, it's there. We glow!","type":"correct","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"94,257,293,353\"},{\"shape\":\"rect\",\"coords\":\"294,301,393,353\"}]"}

Question Bending light.

BKVlSatIK1yzVwBUvH/Yanv1Nh0/FyQiueecPlCz/QE3hUlXFLQhquMbeiBlXK/u7OCs4M2/HjF8PvBYJLD7g0zdZuuMfYb+a/jgbFcsYKV+mY6xU3bgampTCEVtSydq3I4Meg== {"title":"Violet","description":"You got it! Shorter wavelengths, like violet, are slowed more than long wavelengths when they pass through a prism. Because they are slowed more than the reds, they are show more \"bend.\" This is a tough idea, so good job.","type":"correct","color":"#99cc00","code":"[{\"shape\":\"rect\",\"coords\":\"415,188,491,207\"}]"} {"title":"rainbow","description":"Think about the rainbow. Try again,","type":"incorrect","color":"#993300","code":"[{\"shape\":\"rect\",\"coords\":\"414,211,496,288\"}]"} {"title":"red","description":"Of all of the visible wavelengths, the red wavelengths are the least slowed by a prism. Because they aren't slowed down, they aren't bent very much. Try again.","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"414,288,496,308\"}]"}

Question Which image best demonstrates the effect of increasing the size of a telescope's mirror?

z/quVJ78IQOYFWx0Y2/9SHSNQO+IGhcHjogM9ke9E1AbKyg6uW5J71GUGj97EZDbGPYiYA== {"title":"correct","description":"This image is clearer, or has better resolution than the picture to its left because it was taken by a telescope with a larger mirror. The telescope on the left is capable of taking a BRIGHTER image of this galaxy, if it uses a longer exposure, but it can't really take a clearer picture due to its smaller mirror size.","type":"correct","color":"#99cc00","code":"[{\"shape\":\"rect\",\"coords\":\"272,232,487,390\"}]"} {"title":"incorrect","description":"A larger primary mirror is not the most likely explanation for why this image of the moon is different from the image to the right.","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"35,5,257,203\"}]"}

Question Which image best demonstrates the effect of having an eyepiece with a long focal length?

z/quVJ78IQOYFWx0Y2/9SHSNQO+IGhcHjogM9ke9E1AbKyg6uW5J71GUGj97EZDbGPYiYA== {"title":"correct","description":"This image of the moon is smaller than the one to the right because the telescope that took this image had an eyepiece with a longer focal length. Remember that magnification is inversely proportional to the focal length of the eye piece. That means that as the focal length gets longer, the magnification drops.","type":"correct","color":"#000000","code":"[{\"shape\":\"rect\",\"coords\":\"269,7,484,203\"}]"} {"title":"incorrect","description":"This image of the moon is different from the other due to differences in eyepiece focal length. However, this image was taken usig an eyepiece with a shorter focal length.","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"35,5,257,203\"}]"} {"title":"incorrect COPY","description":"The images of the galaxy are different due to the size of the telescopes' primary mirrors.","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"37,233,252,392\"}]"} {"title":"incorrect COPY COPY","description":"The images of the galaxy are different due to the size of the telescopes' primary mirrors.","type":"incorrect","color":"#000080","code":"[{\"shape\":\"rect\",\"coords\":\"272,232,487,391\"}]"}

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