[单选题]
The relationship between enx m:wck(tc)or o 84yy2ergy6p-v(qt 4gqev , E, and wavelength, λ, is shown according to the eep q-64(tvgv qquation 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
