20. a frequency that is Compared with visible EMR, infrared EMR has a wavelength that is The statement above is completed by the information in row i and Row A. longer higher B. longer lower C. shorter higher D. shorter lower 21. through? which of the following orientations of pairs of polarized filters will allow the least light A B. WARNING: Do not look directly into the sun WARNING: Do not look directly into the sun Linear polarized filter Inead Linea Linear polarized filter C. D. WARN Do not jo WARNING: Do not look directly WAR into the sun Do not WARNING: Do not look directly into the sun Linear por Linear polarized filter Linear polarized filter Linear poke