# 1pilihanWhich of the following wavelengths does infrared radiation fall between?400nm-700nm750nm-400000nm200nm-400nm10nm-400nm
# 2pilihanWhat is the primary natural source of infrared radiation?The MoonThe SunEarth's CoreArtificial Heaters
# 3pilihanWhich type of infrared generator produces both light and heat?Non-luminous generatorLuminous generatorSolar generatorWave generator
# 4pilihanWhat effect does the Cosine Law have on radiation absorption?Increases absorption at larger anglesDecreases absorption at larger anglesHas no effectDoubles absorption at all angles