Question

Select One Correct Option from the following: A glass prism of refractive index 1.5 is immersed in water (refractive index $\frac{4}{3}$). A light beam incident normally on the face AB is totally reflected to reach the face BC if
(A) $\sin \theta$ > ${8}/{9}$
(B) 2/3 < $\sin \theta$ < ${8}/{9}$
(C) $\sin \theta$ < ${2}/{3}$(D) None of these.

Answer 1

none of these is correct.
mark brainliest if you like.

Answer 2

Select One Correct Option from the following: A glass prism of refractive index 1.5 is immersed in water (refractive index $\frac{4}{3}$). A light beam incident normally on the face AB is totally reflected to reach the face BC if

(A) $\sin \theta$ > ${8}/{9}$

(B) 2/3 < $\sin \theta$ < ${8}/{9}$

(C) $\sin \theta$ < ${2}/{3}$

✔️ (D) None of these.