1. Which laser uses a gas mixture as the active medium?
(A) Dye laser
(B) Semiconductor laser
(C) Solid-state laser
(D) Gas laser
2. A Helium-Neon (He-Ne) laser is an example of:
(A) Dye laser
(B) Semiconductor laser
(C) Solid-state laser
(D) Gas laser
3. Which laser uses a semiconductor as its active medium?
(A) Dye laser
(B) Gas laser
(C) Solid-state laser
(D) Semiconductor laser
4. Semiconductor lasers are commonly used in:
(A) Metal cutting
(B) CD and DVD players
(C) Holography
(D) Surgery
5. Which laser uses a crystal or glass doped with ions as the medium?
(A) Gas laser
(B) Solid-state laser
(C) Semiconductor laser
(D) Dye laser
6. Ruby laser is an example of:
(A) Gas laser
(B) Solid-state laser
(C) Dye laser
(D) Semiconductor laser
7. Nd:YAG laser is commonly used in:
(A) Barcode scanning
(B) Surgery and industrial cutting
(C) Laser pointers
(D) CD reading
8. Which laser uses organic dyes as the active medium?
(A) Solid-state laser
(B) Gas laser
(C) Dye laser
(D) Semiconductor laser
9. Dye lasers are mostly used for:
(A) CD/DVD reading
(B) Barcode scanning
(C) Tunable wavelengths in research
(D) Metal cutting
10. Which laser type can emit over a wide range of wavelengths?
(A) Solid-state laser
(B) Gas laser
(C) Dye laser
(D) Semiconductor laser
11. Carbon dioxide (CO₂) laser is an example of:
(A) Gas laser
(B) Solid-state laser
(C) Semiconductor laser
(D) Dye laser
12. Which laser is used for laser cutting and engraving metals?
(A) Semiconductor laser
(B) CO₂ laser
(C) Helium-Neon laser
(D) Dye laser
13. Semiconductor lasers are also called:
(A) Gas lasers
(B) Diode lasers
(C) Solid-state lasers
(D) Dye lasers
14. Helium-Neon lasers usually emit:
(A) Blue light
(B) Red light
(C) Green light
(D) Yellow light
15. Which laser type is mostly used in medical procedures?
(A) Gas laser
(B) Solid-state laser
(C) Dye laser
(D) Semiconductor laser
16. Argon-ion lasers produce:
(A) Blue-green light
(B) Red light
(C) Infrared light
(D) Yellow light
17. Gas lasers include:
(A) Ruby, Nd:YAG lasers
(B) He-Ne, CO₂, Argon-ion lasers
(C) Diode lasers
(D) Rhodamine dye lasers
18. Which laser type is tunable for research purposes?
(A) Solid-state laser
(B) Gas laser
(C) Dye laser
(D) Semiconductor laser
19. Which laser type is compact and widely used in consumer electronics?
(A) Semiconductor laser
(B) Gas laser
(C) Solid-state laser
(D) Dye laser
20. Which laser emits infrared light suitable for cutting thick materials?
(A) Diode laser
(B) He-Ne laser
(C) Ruby laser
(D) CO₂ laser
21. Nd:YAG stands for:
(A) Neodymium-doped Yttrium Argentum Glass
(B) Neon-doped Yttrium Aluminum Garnet
(C) Neodymium-doped Yttrium Aluminum Garnet
(D) Nitrogen-doped Yttrium Aluminum Glass
22. Semiconductor lasers are widely used in:
(A) Holography
(B) Metal cutting
(C) Laser surgery
(D) Optical communication
23. Dye lasers are used in:
(A) Metal cutting
(B) Barcode scanning
(C) Laser pointers
(D) Spectroscopy
24. Ruby laser emits:
(A) Green light
(B) Red light
(C) Blue light
(D) Infrared light
25. Which laser type has the highest tunability of wavelength?
(A) CO₂ laser
(B) Dye laser
(C) Semiconductor laser
(D) Solid-state laser
26. Gas lasers require:
(A) Crystal medium
(B) Gas-filled tube and electrical excitation
(C) Semiconductor junction
(D) Organic dye solution
27. Nd:YAG lasers emit:
(A) Blue light
(B) Visible red light
(C) Green light
(D) Infrared light
28. Semiconductor lasers are also used in:
(A) Holography
(B) Metal cutting
(C) Laser printers and barcode scanners
(D) Medical surgery
29. Dye lasers can produce:
(A) Multiple wavelengths depending on the dye
(B) Only red light
(C) Only infrared light
(D) Only blue light
30. CO₂ lasers are:
(A) Gas lasers
(B) Solid-state lasers
(C) Semiconductor lasers
(D) Dye lasers