[填空题]
A beam of light is emita+ fc an3a4)olbdmr6 8q.4ygit;-n0opv5 i.q* evveluat ; z0hed 8.0 cm beneath the surface of a liquid and strikes the surface 7.0 cm from the point directly above the source. If total internal reflection occurs, e. ihvz0vnv5;e lp;0a * quto-what can you say about the index of refraction of the liquid? $n_{liquid} \geq$
