OBT Principles of Optical Beam Physics

Question 1

What is the primary characteristic of a coherent optical beam?

Accepted Answer

Consistent phase relationships

Answer

Random phase shifts

Answer

Broad spectrum

Answer

Low intensity

Question 2

Which principle allows lasers to amplify light?

Accepted Answer

Stimulated emission

Answer

Spontaneous scattering

Answer

Photoelectric effect

Answer

Photon absorption

Question 3

What unit measures the energy of a photon?

Accepted Answer

Electron volts

Answer

Joules

Answer

Watts

Answer

Newtons

Question 4

What defines beam collimation?

Accepted Answer

Beam alignment and narrowness

Answer

Random spreading

Answer

Beam divergence

Answer

Low power output

Question 5

Which beam property affects tissue penetration?

Accepted Answer

Wavelength

Answer

Color

Answer

Speed

Answer

Pulse rate

Question 6

What is divergence in an optical beam?

Accepted Answer

Beam spread over distance

Answer

Power output

Answer

Intensity loss

Answer

Noise level

Question 7

Which medium enhances beam focus?

Accepted Answer

Lens

Answer

Mirror

Answer

Filter

Answer

Diffuser

Question 8

What type of beam offers highest precision?

Accepted Answer

Collimated monochromatic beam

Answer

Scattered UV light

Answer

Infrared flood beam

Answer

Broadband pulse

Question 9

What phenomenon causes beam reflection at tissue interfaces?

Accepted Answer

Refractive index mismatch

Answer

Wavelength absorption

Answer

Heat transfer

Answer

Photon drift