what is the number of photons of light with a wavelength of 4000 pm that provide 1 J of energy ?

Explanation

To find the number of photons of light with a wavelength of 4000 pm (picometers) that provide 1 J of energy, we can follow these steps:

### Step 1: Convert the wavelength from picometers to meters.
Given:
- Wavelength (λ) = 4000 pm

To convert picometers to meters:
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