QUESTION 30

1.

Select the difference(s) between optical LED and LD light sources.

		a. LED light sources are slower than LDs
		b. LEDs produce incoherent light, compared to LDs which produce coherent light
		c. LDs have a more narrow spectral width compared to LEDs
		d. All of the above are differences between LEDs and LDs

QUESTION 29

1.

When considering the quality of laser light sources, a narrower spectral width is preferred.

True

False