In this issue of "Popular Science·Truth-seeking", we have deeply explored an important concept in laser technology - spectrum. Next, let's go to the Q&A classroom together to review those key knowledge points and test your professional knowledge.

Q&A Classroom

1. Which of the following factors are mainly affected by the selection of laser spectrum? Single choice

A. Laser color and penetration depth
B. Laser power output
C. Laser reflectivity and scattering angle
D. Laser wavelength and frequency

2. In the treatment of laser removal of spots or tattoos, the commonly used laser wavelength is: Single choice

A. 1064 nm and 532 nm
B. 1550 nm and 2940 nm
C. 1064 nm and 2940 nm
D. 532 nm and 1064 nm

3. The application of 1064 nm long pulse laser in medical cosmetology is mainly used for: Single choice

A. Removal of spots and tattoos
B. Improve skin elasticity and firmness
C. Treat vascular lesions
D. Promote skin surface repair

4. The main mechanism of action of 1064 nm long pulse laser in treating vascular lesions (such as red blood streaks) is: Single choice

A. Directly destroy blood vessels through strong thermal effects
B. Stimulate the repair of tissues around blood vessels
C. Reduce pigmentation on the surface of the skin
D. Improve vascular health by enhancing blood circulation

5. Which of the following factors mainly affects the safety and effectiveness of laser treatment? Single choice

A. Laser frequency
B. Spectrum selection
C. Laser wavelength
D. Brightness of the light source

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