Question

wavelength (nm) 400 500 600 700 a 435 nm b 500 nm c 610 nm d 680 nm

Explanation:

To solve this, we analyze the wavelength scale (400 - 700 nm) and the options:

• Option A (435 nm): Close to 400, but let's check others.
• Option B (500 nm): Matches the major tick at 500 nm on the x - axis.
• Option C (610 nm): Near 600, but the 500 tick is clear.
• Option D (680 nm): Near 700, not matching 500.

The wavelength value that aligns with the 500 nm mark on the graph is 500 nm.

Answer:

B. 500 nm