v<(0.707ve)\mathrm{v}<\left(0.707 \mathrm{v}_{\mathrm{e}}\right)v<(0.707ve)
v>(0.707ve)\mathrm{v}>\left(0.707 \mathrm{v}_{\mathrm{e}}\right)v>(0.707ve)
v=0.707ve\mathrm{v}=0.707 \mathrm{v}_{\mathrm{e}}v=0.707ve
v=ve\mathrm{v}=\mathrm{v}_{\mathrm{e}}v=ve