[单选题]
The relationship between energxoqr.g ej 7 8usp8*a1xy, E,gngzq6 aqw)7q z3um0 ) and wavelength, λ, is shown according to the equatiz)6 q)gu ag0q3wqzmn7on below.
E=$\frac{hc}{λ}$
Which of the below statements are correct for the graph below representing E=$\frac{hc}{λ}$?
I.Energy and wavelength are directly proportional
II.The units for the gradient are J m$^{-1}$
III.The y-intercept has the units J
A. I and III only
B. II and III only
C. III only
D. I, II, and III
