A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index `mu=1.5` as shown. The position of the image formed by refraction at the image formed by refraction at the spherical surface only as

Options

A. `R/2`
B. `3R`
C. `R/3`
D. `2R`

Answer

B

Explanation

Applying, `mu_2/v-mu_1/u=(mu_2-mu_1)/R` we get,
`1.5/v-1/oo=(1.5-1.0)/(+R)`
`:. v=+3R`