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Lasers Quiz Number: 2 Course Name: Industrial Technology/Engineering Quiz N0. = 2 Teacher: E. Schmidt Teacher's Home Page: http://www.oocities.org/Baja/2140/ENG.htm Teacher's Email: schmidte@putnam.k12.il.us

Student Name: Student No:

No. of Questions= 20 ,Pass mark is - 70 %. You can press the Mark it button at the bottom of the page to have the quiz marked.

1.	Lasers are used to:
	a)	communicate
	b)	calculate distance
	c)	record and retrieve information
	d)	fix the human body
	e)	all of these
2.	Which of the following statements is false:
	a)	The letter L in laser stands for light
	b)	the letter A stands for amplification
	c)	the letter S for stimulated
	d)	the letter E for electrical
	e)	the letter R for radiation
3.	Which of these statements is false about lasers:
	a)	laser light comes in many colors
	b)	laser light comes in a thin beam
	c)	laser light may come in one color
	d)	it's intensity is variable
	e)	it can be focused in a tiny spot
4.	The laser light may be activated by a few _____, but then many, many more are generated:
	a)	neutrons
	b)	electrons
	c)	protons
	d)	lasertrons
	e)	photons
5.	Who in 1917 described the process of Stimulated Light:
	a)	Alexander Graham Bell
	b)	Bill Nasa
	c)	Albert Einstein
	d)	Marconi
	e)	Tesla
6.	In a laser the photons bounce between:
	a)	wires
	b)	gases
	c)	electrodes
	d)	mirrors
	e)	magnets
7.	When a laser emits photons this is known as:
	a)	simulation
	b)	radiation
	c)	convection
	d)	reflection
	e)	refraction
8.	What type of energy can be felt as heat:
	a)	infared
	b)	radio waves
	c)	microwaves
	d)	bipolar waves
	e)	photo waves
9.	which of these colors is not a major color in the visible light spectrum:
	a)	red
	b)	turquoise
	c)	orange
	d)	yellow
	e)	green
10.	The first true laser was made in what year:
	a)	1950
	b)	1940
	c)	1960
	d)	1970
	e)	1980
11.	The first laser was made by:
	a)	NASA
	b)	Henry Ford
	c)	Westinghouse
	d)	Samuel Morse
	e)	Theodore Maimam
12.	You can fine lasers being used in:
	a)	hospitals
	b)	supermarkets
	c)	CD Players
	d)	rulers
	e)	all of the above
13.	An individual pulse of laser light used in eye surgery will last about:
	a)	1 second
	b)	5 seconds
	c)	1 millionth of a second
	d)	5 billionths of a second
	e)	1.5 zillionths of a second
14.	Lasers can read inside body organs by the use of:
	a)	fiber optics
	b)	cable
	c)	tubes
	d)	wire
	e)	syringes
15.	In a supermarket, lasers read:
	a)	labelss
	b)	colors
	c)	bar codes
	d)	package size
	e)	wrappers
16.	Pits can be found on:
	a)	CD's
	b)	records
	c)	tapes
	d)	bar codes
	e)	lables
17.	What travels at 670 million miles per hour:
	a)	neutrons
	b)	photons
	c)	protons
	d)	electrons
	e)	microwaves
18.	Interferometry is a process used in:
	a)	measuring distance
	b)	measuring weight
	c)	measuring volume
	d)	measuring area
	e)	measuring size
19.	A human hair is how many "pits " wide:
	a)	4
	b)	40
	c)	400
	d)	444
	e)	44
20.	The supermarket scanner has a light sensitive device called:
	a)	photon cell
	b)	wave cell
	c)	neutron cell
	d)	code cell
	e)	photo cell

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