  We theoretically study the transmittance for normal incidence of linearly
polarized light between two media separated by a strained graphene monolayer.
We analytically characterize the degree of dichroism and the transparency of
graphene as a function of an arbitrary uniform strain and the incident
polarization. We discuss how measurements of dichroism and transparency for two
different polarization directions can be used to determine the magnitude and
direction of strain. Ours findings result in very useful tools to tune the
graphene absorption by mechanical strain, as well as to design nano-devices to
determine crack propagation in materials.
