Three flat layers of transparent material are stacked upon one another. The top layer has inder of refractioe
m_(5)
, the middle
n_(2)
and the botiom one
n_(5)
. If
n_(1)>n_(2)>m_(3)
, and a ray of light in air strikes the top layer, at which surface given can total internal reflection occur first?
q,
Total internal reflection cannot occur at any of these surfaces. the surface berween mancrials with indices
n_(2)
and
n_(3)
the top surface the surface between materials with indices
n_(1)
and
n_(2)