What is the number of photons of light with a wavelength of 4000 PM that provide 1 joule of energy

What is the number of photons of light with a wavelength of 4000 PM th

1.	What is the number of photons of light with a wavelength of 4000 PM that provide 1 joule of energy
Answer» 0.223×10^-35.<br>2.014 ×10 to the power 15