Critical Angle and Total Internal Reflection · CSEC Physics

15 past-paper questions on Critical Angle and Total Internal Reflection, part of Waves and Optics, from every CSEC Physics paper on Quelpr.

1. 3(d)1 mark· CSEC Physics · 2021 · Paper 2On the diagram in Figure 3, label the critical angle, θ_c, for ice.
2. 1(c)(i)2 marks· Physics Q1 1(c)(i)Explain the term 'critical angle'.
3. 1(c)(ii)1 mark· Physics Q1 1(c)(ii)Using Table 1, or otherwise, state the critical angle for the glass used in (a).
4. 1(d)4 marks· Physics Q1 1(d)If the refractive index from the cladding to the core is 1.03, calculate the critical angle in the core.
5. 3(a)(iv)2 marks· Physics Q3 3(a)(iv)The mirage is a virtual image. With reference to Rays B and C, explain how the mirage is formed and why it is described as a virtual image.
6. 3(b)(i)7 marks· Physics Q3 3(b)(i)Describe the path into a prism and out of a prism when a ray of light is incident at 90° to the hypotenuse of a right-angled glass prism as shown in Figure 1.
7. 3(b)(ii)1 mark· Physics Q3 3(b)(ii)Through what angle would the ray be turned after emerging? [Critical angle for glass = 42° ]
8. 3(b)(iv)3 marks· Physics Q3 3(b)(iv)Determine the value which angle d (d̂) must exceed if E is to be totally internally reflected.
9. 4(b)(ii)3 marks· Physics Q4 4(b)(ii)Given that angle c is the critical angle for the air-water boundary, calculate the refractive index of the water.
10. 4(b)(iii)9 marks· Physics Q4 4(b)(iii)If the critical angle for glass is 42°, describe what would happen to the ray if its angle of incidence on boundary BC was 42.5°.
11. 4(b)(iv)9 marks· Physics Q4 4(b)(iv)State the reason for your conclusion at (iii) above.
12. 4(c)(i)2 marks· Physics Q4 4(c)(i)What is meant by 'total internal reflection' at point C?
13. 4(c)(ii)1 mark· Physics Q4 4(c)(ii)Is the refractive index of the cladding greater or smaller than that of the core?
14. 4(c)(iii)1 mark· Physics Q4 4(c)(iii)Draw on Figure 3, the ray that shows the path of the light continuing on from C.
15. 5(b)(ii)9 marks· Physics Q5 5(b)(ii)Given that the critical angle for the glass-air boundary, PQ, is 41.8°, deduce whether or not there would be total internal reflection at this boundary.