Question

Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound responsible for light absorption and the color of plants, chlorophyll, strongly absorbs light with a wavelength of . Calculate the frequency of this light. Be sure your answer has the correct number of significant digits.

Answer 1

Answer:

$f=4.67x10^{14}Hz$

Explanation:

Hello,

The frequency and wavelength of electromagnetic waves propagating in free space might be related to each other by using the following equation:

c=λf

Solving for the frequency:

f=c/λ

Knowing that λ stands for the wavelength (642 nm for the mentioned incident light), c the light velocity (300.000 m/s) and f the frequency, we get the asked frequency as:

$f=\frac{3x10^6m/s}{642x10^{-9}m} =4.67x10^{14}Hz$}

Best regards.