A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the lowest frequency associated with this portion of the spectrum?
A) 1.50 × 1014 Hz
B) 7.50 × 1013 Hz
C) 7.50 × 1014 Hz
D) 7.50 × 1015 Hz
E) 1.50 × 1015 Hz
C
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Indicate whether the statement is true or false
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Which of the following statements about the cosmic background radiation is not true?
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The principal greenhouse gases are ______________ and ______________
Fill in the blank(s) with correct word