The number of photons of light of wavelength 450nm which can provide 100j of energy is equal to

The number of photons of light of wavelength 450nm which can provide 1

1.	The number of photons of light of wavelength 450nm which can provide 100j of energy is equal to
Answer» he wavelength of light is 4000pm or 4000×10 −12 m or 4000×10 −9 m.The ENERGY ONE photon is λhc = 4×10 −9 6.626×10 −34 ×3×10 8 =4.97×10 −17 .The NUMBER of photons that will PROVIDE 1 J of energy is 4.97×10 −17 1J J=2.01×10 18 .