CAIE IGCSE Physics 3.2.2.3 Passage of Light Through a Transparent Questions

Practise tracing light across one transparent boundary, linking its change of speed to bending toward or away from the normal while normal incidence stays straight.

Exam points

Distinguish scalars from vectors by direction and classify common physics quantities.

[Maximum number: 4]

Fig. 5.1 shows a ray of yellow light incident on a glass prism ABC .

Fig. 5.1

(a)

Explain why the ray does not change direction when it enters the prism at face AB.

[ 1 ]

ray travels along the normal OR angle of incidence $=0\left({ }^{\circ}\right)$

(b)

The critical angle for the glass is $42^{\circ}$ .

[ 3 ]

(i)

On Fig. 5.1, continue the path of the light through the prism and after it leaves the prism.

[ 3 ]

ray reflected at BC AND no refracted ray
ray hits AC with angle of incidence $=0^{\circ}$
correct refraction of candidate's ray into air at AC

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CAIE IGCSE Physics 3.2.2.3 Passage of Light Through a Transparent Questions question 1

Question (a)

Question (b)

Question (i)