The wavelength of red light is 650 nanometers. how much bigger is the wavelength of a water wave that measures 2 meters?

Wavelength of red light = 650 nm

Here the unit is nanometer, nano means 10⁻⁹

And wavelength of water = 2m

1 nanometer = 10⁹ meter

So, 2 meter = 2 x 10⁹ nm and 650nm = 6.5 x 10⁻⁷ m

now you can see the difference how much wavelength of water is bigger than wavelength of red light.

if we find the difference between them

650 nm =.00000065 m

2m -.00000065m = 1.99999935

so, the water wave is ~1.99999935 meters larger than the red light wave