Light

Question 1

What kind of waves are light?

Answer 1

Transverse waves

Question 2

What is the law of reflection?

Answer 2

Angle of Incidence = Angle of Reflection

Question 3

What is the equation for refractive index?

Answer 3

Angle of Incidence / Angle of Refraction

N = Sin i / Sin r

Question 4

What is the equation for critical angle?

Answer 4

1 / Refractive Index

Sin c = 1 / n

Question 5

What is the critical angle?

Answer 5

The Angle of Incidence when the Angle of Refraction is 90 degrees

Question 6

What is Total Internal Reflection?

Answer 6

All of the light is reflected inside the material. No refraction occurs at all

Question 7

What are Optical Fibres?

Answer 7

Fibres made of two different types of glass. The core is made of one type of glass and the cladding is made of a less optically dense glass.

Question 8

Will the refractive index in an optical fibre be greater in the core or the cladding?

Answer 8

Core

Question 9

How are optical fibres used?

Answer 9

• Sending communications: They provide Internet (E3 full fibre broad band)
• Endoscopes- Human and tree Surgery, Mechanics