题目内容

In 1958, Towns and Arthur Show Low proposed the "Laser Principle" through experiments and won the ( )of 1964.

A. Nobel Prize in Literature
B. Nobel Prize in Physics
C. Nobel Prize in Chemistry
D. Nobel Prize in Biology

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The four characteristics of laser light refer to ( ).

A. high directivity
B. high brightness
C. high monochromaticity
D. high coherence

( ) can be used for low-power irradiation or repair of skin, facial features, maternity, etc., because it has the effects of stimulation, anti-inflammatory, analgesia and vasodilation.

A. He-Ne laser
B. Hydrogen oxide laser
Carbon dioxide laser
D. Carbon monoxide laser

According to the type of laser working substance. Lasers can be divided into ( ).

A. Gas laser
B. Solid-state laser
C. Liquid laser
D. Semiconductor laser

Using laser technology to print the required marks or labels on the surface of the material belongs to ( ).

A. Laser welding
B. Laser cutting
C. Laser drilling
D. Laser marking