en CR Light and Telescope 48 Galilei: was the first to study celestial objects using a telescope he built from lenses LIGHT: is a form of radiation which is called electromagnetic radiation. Particles: Light acts like _____, this explains how shadows work. Waves: Light also acts like _____, ripples in space—instead of bullets. Radiation: Electromagnetic Waves are also know as Electromagnetic __________ Photons: Particles of a light Frequency: the amount of energy of photons depend on the __________ Shorter: the longer the wavelength the ______ the frequency higher : the shorter the wavelength, the _______the frequency Newton: was the first to discover that the sunlight contains all the seven colors and he did this using prism. Spectrum: is the arrangement of light from an object according to wavelength. Windows: visible and radio windows Scintillation: twinkling appearance of stars Magnification: can be adjusted by changing eyepiece Concave: if someone looks into an eyepiece of a telescope, a ______ lens magnifies the image Lippershey: designed the first refracting telescope Jupiter: Galileo used the first refracting telescope to study the moons of _______ Moon: Galileo also used the telescope to map the surface of the __________ Reflecting: telescopes that used curve mirrors instead of convex lenses Radio: kind of telescope consisting of a radio receiver and an antenna Reber: built the first radio telescope Photometer: is a light-sensitive meter that measures the brightness and color of stars. Imaging: ____ system is a photographic plate was the original imaging system used to record faint objects over a long period of time Spectrograph: is a device that separates light according to wavelength. Perplexing: light is a ______ phenomenon Perception: our brains and eyes act together to make extraordinary things happen Movies: are sequences of still pictures Magazine: ________ pictures are arrays of dots Wavelength: the amount of energy of photons depends on its __________ Gamma: _______ rays are the most energetic form of light Infrared: ________ light is electromagnetic radiation with longer wavelengths than those of visible light Ultraviolet: ________ rays are invisible rays emitted as energy by the sun Radar: object detection system which is using radio waves FM: frequency modulation Absorbed: when an object has electromagnetic spectrum, it means that the object has ______ electromagnetic radiation Sunlight: Isaac Newton discovers that the ________ contains all the seven colors Arrangement: spectrum is the __________ of light according to wavelength Refracting: _______ telescope that works just like a magnifying glass Convex: refracting telescopes use a ______ lens Focus: point of ______ is where the image is created Magnification: can be adjusted by changing the eyepiece Bent: in a refracting telescope, images are not always clear because light is being ______ Limited: the _____ size of the lens limits the power of the telescope Tube: Lippershey put the lenses into a _____ to make the first refracting telescope Larger: using the telescope, Galileo could see the images 20 times _____ than the human eye could see Dark: reflecting telescopes are very helpful for viewing _______ objects Gregory: a Scottish astronomer who came up with the design for reflecting telescopes Newton: the first to make a reflecting telescope Prism: using this, Newton discovered that the sunlight is consist of seven colors Paraboloid: a device with parabolically shaped reflector Feed: small pick up antenna Color: is more than a decoration Index: refractive ______ indicates how much light will be bent Reflecting: better images are seen through ______ telescopes Reflector: the most familiar type of radio telescopes Horn: in radio telescope, the _____ is a wave guide horn Highest: photons are the __________ energy corresponds to shortest wavelength Visible: the _______ light spectrum is the range of electromagnetic radiations Quantum: _______ optics is the field of physics where the study of individual photons is crucial Huygen: “Every point of a wave front may be considered the source of secondary wavelets that spread out in all directions with a speed equal to the speed of propagation of the waves.” Is a principle of ______

Light and Telescope

		1						2			3												4 F
					5															6
								F												7
											R		8		9	10		11
					12 R																	13
		14		D																				15 P
																								E
													16					E		17
			18		A
								G		19										20 Q

				21		N				22			23	24			I
										P
		25				E			26								27					E

	28		29	30 H													31 G		32		33
																			A
									34						35	E
							36														O
37									38		E
				S
							39			P							40
	C
41				O					42
												43		V
			44	U
																	45		O
	46										47			A

Across:

2.	Electromagnetic Waves are also know as Electromagnetic __________
5.	Lippershey put the lenses into a _____ to make the first refracting telescope
7.	“Every point of a wave front may be considered the source of secondary wavelets that spread out in all directions with a speed equal to the speed of propagation of the waves.” Is a principle of ______
9.	using this, Newton discovered that the sunlight is consist of seven colors
14.	refractive ______ indicates how much light will be bent
16.	built the first radio telescope
17.	the longer the wavelength the ______ the frequency
18.	____ system is a photographic plate was the original imaging system used to record faint objects over a long period of time
19.	the most familiar type of radio telescopes
21.	visible and radio windows
23.	twinkling appearance of stars
25.	using the telescope, Galileo could see the images 20 times _____ than the human eye could see
26.	was the first to discover that the sunlight contains all the seven colors and he did this using prism.
29.	is a light-sensitive meter that measures the brightness and color of stars.
31.	_______ rays are the most energetic form of light
34.	point of ______ is where the image is created
35.	in a refracting telescope, images are not always clear because light is being ______
37.	the shorter the wavelength, the _______the frequency
38.	the amount of energy of photons depend on the __________
39.	designed the first refracting telescope
41.	kind of telescope consisting of a radio receiver and an antenna
43.	the amount of energy of photons depends on its __________
44.	Galileo used the first refracting telescope to study the moons of _______
46.	the first to make a reflecting telescope
47.	spectrum is the __________ of light according to wavelength

Down:

1.	________ pictures are arrays of dots
2.	better images are seen through ______ telescopes
3.	________ light is electromagnetic radiation with longer wavelengths than those of visible light
4.	small pick up antenna
6.	Particles of a light
8.	object detection system which is using radio waves
10.	telescopes that used curve mirrors instead of convex lenses
11.	are sequences of still pictures
12.	_______ telescope that works just like a magnifying glass
13.	________ rays are invisible rays emitted as energy by the sun
15.	our brains and eyes act together to make extraordinary things happen
20.	_______ optics is the field of physics where the study of individual photons is crucial
22.	is a device that separates light according to wavelength.
24.	refracting telescopes use a ______ lens
27.	is a form of radiation which is called electromagnetic radiation.
28.	can be adjusted by changing the eyepiece
30.	photons are the __________ energy corresponds to shortest wavelength
32.	can be adjusted by changing eyepiece
33.	when an object has electromagnetic spectrum, it means that the object has ______ electromagnetic radiation
36.	Isaac Newton discovers that the ________ contains all the seven colors
40.	Galileo also used the telescope to map the surface of the __________
42.	reflecting telescopes are very helpful for viewing _______ objects
45.	frequency modulation

Light and Telescope

Across:

2.	Electromagnetic Waves are also know as Electromagnetic __________
5.	Lippershey put the lenses into a _____ to make the first refracting telescope
7.	“Every point of a wave front may be considered the source of secondary wavelets that spread out in all directions with a speed equal to the speed of propagation of the waves.” Is a principle of ______
9.	using this, Newton discovered that the sunlight is consist of seven colors
14.	refractive ______ indicates how much light will be bent
16.	built the first radio telescope
17.	the longer the wavelength the ______ the frequency
18.	____ system is a photographic plate was the original imaging system used to record faint objects over a long period of time
19.	the most familiar type of radio telescopes
21.	visible and radio windows
23.	twinkling appearance of stars
25.	using the telescope, Galileo could see the images 20 times _____ than the human eye could see
26.	was the first to discover that the sunlight contains all the seven colors and he did this using prism.
29.	is a light-sensitive meter that measures the brightness and color of stars.
31.	_______ rays are the most energetic form of light
34.	point of ______ is where the image is created
35.	in a refracting telescope, images are not always clear because light is being ______
37.	the shorter the wavelength, the _______the frequency
38.	the amount of energy of photons depend on the __________
39.	designed the first refracting telescope
41.	kind of telescope consisting of a radio receiver and an antenna
43.	the amount of energy of photons depends on its __________
44.	Galileo used the first refracting telescope to study the moons of _______
46.	the first to make a reflecting telescope
47.	spectrum is the __________ of light according to wavelength

Down:

1.	________ pictures are arrays of dots
2.	better images are seen through ______ telescopes
3.	________ light is electromagnetic radiation with longer wavelengths than those of visible light
4.	small pick up antenna
6.	Particles of a light
8.	object detection system which is using radio waves
10.	telescopes that used curve mirrors instead of convex lenses
11.	are sequences of still pictures
12.	_______ telescope that works just like a magnifying glass
13.	________ rays are invisible rays emitted as energy by the sun
15.	our brains and eyes act together to make extraordinary things happen
20.	_______ optics is the field of physics where the study of individual photons is crucial
22.	is a device that separates light according to wavelength.
24.	refracting telescopes use a ______ lens
27.	is a form of radiation which is called electromagnetic radiation.
28.	can be adjusted by changing the eyepiece
30.	photons are the __________ energy corresponds to shortest wavelength
32.	can be adjusted by changing eyepiece
33.	when an object has electromagnetic spectrum, it means that the object has ______ electromagnetic radiation
36.	Isaac Newton discovers that the ________ contains all the seven colors
40.	Galileo also used the telescope to map the surface of the __________
42.	reflecting telescopes are very helpful for viewing _______ objects
45.	frequency modulation