3. TOTAL INTERNAL REFLECTION
When light travels from a denser
medium to a rarer medium, if the
angle of incidence is greater than
the critical angle the ray return to
the denser medium. This is
known as total internal reflection

4. Ɵ1<c Ɵ1=c Ɵ1>c

5. 1. Light should travel from denser medium to rarer
medium
2. Angle of incidence in the denser medium should be
greater than the critical angle(Ɵ1>c)

6. n1
n2

7. 1.Brilliance of diamond

8. 2.mirage

9. 3.Total reflection prisms

10. 4.Rainbow

11. 5.Opical fiber

12. 1.Optical fiber communication
2.Prism used in binoculars for producing erect
images
3.Endoscopy
4.Jewellary purpose