Ultraviolet light emits a total of 2.5 × 10–17 J of light at a wavelength of 9.8 × 10–7 m. How many photons does this correspond to?

Question

anonymous · Answer

i did the work and i keep getting 123 when the answer is 125 i dont know what i am doing wrong

chmvijay · Answer

just convert this one to wavelength       E=hc/wavelength
wavelenth= hc/E =

chmvijay · Answer

no problem small changes will be always there ur right

anonymous · Answer

sorry the question was this not the one i posted Ultraviolet light emits a total of 2.5 × 10–17 J of light at a wavelength of 9.8 × 10–7 m. How many photons does this correspond to?