Question

Which of the following frequencies is associated with the visible region of a spectrum?

• A. $3\times {10}^9$ cycle /seconds
• B. $6\times {10}^{14}$ cm cycle /seconds
• C. $5.0\times {10}^{10-3}$ cycle /seconds
• D. None of these

Answer 1

The correct option is B $6\times {10}^{14}$ cm cycle /seconds

Frequency range of visible region $430-770$

$T{H}_2$

$430\times {10}^{12}-770\times {10}^{12}Hz$

$6\times {10}^{14}$ cycle/second associated with visible region