The refractive index of the material of a prism of angles 45° -45° -90° is 1.5 . Among the following, which one correctly shows the path of the ray of light incident normally on the hypotenuse side?

Question

The refractive index of the material of a prism of angles 45° -45° -90° is 1.5 . Among the following, which one correctly shows the path of the ray of light incident normally on the hypotenuse side? (A) Option 1

(B)

(C)

(D)

Tardigrade Admin · Accepted Answer

The incident angle on side AB is 45° 1.5sin(45 ° )>1 . So, the ray would suffer total internal reflection. Same will happen on the side AC . Hence, the ray would reflect again and become parallel to the incident ray through side BC .

Q. The refractive index of the material of a prism of angles $4 5^{\circ} - 4 5^{\circ} - 9 0^{\circ}$ is $1.5$ . Among the following, which one correctly shows the path of the ray of light incident normally on the hypotenuse side?

The incident angle on side $A B$ is $4 5^{\circ}$
$1.5 s in (4 5^{\circ}) > 1$ .
So, the ray would suffer total internal reflection. Same will happen on the side $A C$ .
Hence, the ray would reflect again and become parallel to the incident ray through side $BC$ .

Q. The refractive index of the material of a prism of angles 45∘−45∘−90∘ is 1.5 . Among the following, which one correctly shows the path of the ray of light incident normally on the hypotenuse side?

The incident angle on side AB is 45∘ 1.5sin(45∘)>1 . So, the ray would suffer total internal reflection. Same will happen on the side AC . Hence, the ray would reflect again and become parallel to the incident ray through side BC .

Q. The refractive index of the material of a prism of angles $4 5^{\circ} - 4 5^{\circ} - 9 0^{\circ}$ is $1.5$ . Among the following, which one correctly shows the path of the ray of light incident normally on the hypotenuse side?

The incident angle on side $A B$ is $4 5^{\circ}$
$1.5 s in (4 5^{\circ}) > 1$ .
So, the ray would suffer total internal reflection. Same will happen on the side $A C$ .
Hence, the ray would reflect again and become parallel to the incident ray through side $BC$ .