laser properties

In fiber-optic communication, which property of laser light ensures that the signal can travel long distances without mixing with other signals?

• High coherence

• Divergence

• Spontaneous emission

• Pumping

In LASIK eye surgery, why is directionality of the laser beam crucial?

• It ensures the laser hits only the targeted corneal tissue

• It changes the eye’s color

• It allows the beam to pass through the eyelid

• It increases laser speed

In military range-finding equipment, why is a laser preferred over ordinary light?

• It is invisible to the human eye

• It travels faster than normal light

• It maintains a narrow beam over long distances for accurate targeting

• It requires no power source

What is the primary advantage of using laser technology in precision cutting compared to traditional methods?

• It produces less heat, reducing material distortion

• It can cut through any material

• It requires no maintenance

• It is more affordable

In the context of laser printers, what role does the laser play in the printing process?

• It cools the printed page

• It creates a static charge on the drum

• It scans the document for errors

• It melts the toner onto the paper

Why are lasers commonly used in barcode scanners?

• They can operate in complete darkness

• They are less expensive than other scanning technologies

• They provide a precise and focused beam for accurate reading

• They can read multiple barcodes at once

You are an engineer in a semiconductor fabrication plant. The laser used in photolithography keeps changing wavelength slightly, and the chip patterns are becoming blurry.
Which property must be improved?

• Coherence

• Monochromaticity

• Polarization

• Directionality

You’re in the defense field, designing a laser rangefinder for tanks. You need the beam to travel 5 km without significant spread. Which property is critical?

• Directionality

• Monochromaticity

• Temporal coherence

• Polarization

You are in an automobile plant using laser welding. Some welds are weak because the laser isn’t delivering enough concentrated energy to melt the parts.
Which property is the problem?

• High intensity

• Coherence

• Tunability

• Directionality

In laser cutting technology, what is the significance of focus in the laser beam?

• It ensures a cleaner cut with minimal kerf

• It increases the speed of cutting

• It allows for deeper penetration into materials

• It reduces the amount of energy required