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 662nm. Calculate the frequency of this light. Be sure your answer has the correct number of significant digits.

Answer 1

4.5 × 10^14 Hz

Step-by-step explanation:

According to this question, chlorophyll pigment strongly absorbs light with a wavelength of 662nm. To calculate the frequency of this light, the following formula is used:

λ = v/f

Where;

λ = wavelength (m)

v = speed of light (3×10^8m/s)

f = frequency of light (Hz)

Since the λ = 662nm = 662 × 10^-9m,

f = v/λ

f = 3 × 10^8/662 × 10^-9

f = 0.004531 × 10^(8+9)

f = 0.0045 × 10^17

f = 4.5 × 10^14 Hz