when the frequency of an electromagnetic wave is 400,000,000,000,000 hz, red light results. which of these…

when the frequency of an electromagnetic wave is 400,000,000,000,000 hz, red light results. which of these is the frequency of red light?\na. $4 \\times 10^{14}$\nb. $4 \\times 10^{15}$\nc. $10 \\times 4^{14}$\nd. $10 \\times 4^{15}$

when the frequency of an electromagnetic wave is 400,000,000,000,000 hz, red light results. which of these is the frequency of red light?\na. $4 \\times 10^{14}$\nb. $4 \\times 10^{15}$\nc. $10 \\times 4^{14}$\nd. $10 \\times 4^{15}$

Answer

Explanation:

Step1: Count decimal shift needed

To convert 400,000,000,000,000 to scientific notation, move the decimal point 14 places left to get a number between 1 and 10.

Step2: Write in scientific notation

The number becomes $4 \times 10^{14}$, since we moved the decimal 14 places.

Step3: Match with options

Compare to given choices; this matches option A.

Answer:

A. $4 \times 10^{14}$