When light travels from a denser medium to a rarer medium, if the angle of incidence is greater than the critical angle, total internal reflection occurs and the light ray returns to the denser medium rather than passing into the rarer medium. Total internal reflection is responsible for phenomena like the brilliance of diamonds, mirages, and the operation of optical fibers and prisms.

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