When light strikes a surface, it does 4 main things. It can..

• Reflect

• refract

• transmit

• absorb

• all of he above

select the examples of refraction

• 
• 
• 
• 

Which of the following statement about optical fibre is incorrect?

• Light is totally internally reflected down the fibre

• It is used in medical (endoscope)

• It is used in fibre optic communication.

• Angle of incidence of light in optical fibre must less than critical angle.

Chose the TWO conditions are NOT correct for total internal reflection to take place

• The incident angle should be less than the critical angle

• The incident angle should be greater than the critical angle

• Light should travel from a denser to a lighter medium

• Light should travel from a lighter to a denser medium

In an optical fiber, the concept of Numerical aperture is applicable in describing the ability of __________

• Light Collection

• Light Scattering

• Light Dispersion

• Light Polarization

The core of a fiber optic cable is made of

• Air

• Glass

• Diamond

• Quartz

Optical fibers suffer radiation losses at bends or curves on their paths. State true or false

• True

• False

Optical fibers for communication use are mostly fabricated from

• Plastic

• Silica or multicomponent glass

• Ceramics

• Copper

If a particular optical power is coupled from an incoherent LED into a low-NA fiber, the device must exhibit very high radiance . State whether the given statement is true or false

• True

• False

A permanent joint formed between two different optical fibers in the field is known as a

• Fiber splice

• Fiber connector

• Fiber attenuator

• Fiber dispersion