Test 1

In graded index fiber total reflected light takes a-------

• Straight path

• Parabolic path

• Elliptical path

• Circular path

Optic fiber works on the phenomenon of

• total internal reflection

• polarization

• diffraction

• refraction

Optic fibers are used in .........

• CAT scans

• X ray photos

• Ultrasound scan

• Endoscopy

Which of the following is not the property of LASER light?

• Coherence

• Chromaticity

• High intensity

• Directionality

What is the region enclosed by the optical cavity called?

• Optical region

• Optical system

• Optical box

• Optical resonator

Life time of metastable state in a Ruby laser is......

Pumping mechanism used in Ruby laser is.........

• optical pumping

• Electrical pumping

• Chemical pumping

• Thermal pumping

Which of the following phenomenon can only be seen in transverse waves ?

• Diffraction

• Dispersion

• Interference

• Polarization

Light is polarized to the maximum when it is incident on a glass surface at an angle of incidence

Brewster's law is ......