The frequency range of infrared rays is from:
A. 3 × 10-11 Hz to 4 × 10-14 Hz
B. 1 × 1013 Hz to 4 × 1014 Hz
C. 3 × 10-11 Hz to 40 × 1014 Hz
D. 3 × 1011 Hz to 40 × 1014 Hz
Answer:B
The frequency range of infrared rays is from:
A. 3 × 10-11 Hz to 4 × 10-14 Hz B. 1 × 1013 Hz to 4 × 1014 Hz C. 3 × 10-11 Hz to 40 × 1014 Hz D. 3 × 1011 Hz to 40 × 1014 Hz