Television & Apollo Project

Which of these is one of the primary colors of television pixels?

• the color yellow

• the color green

• the color purple

• the color orange

Which of the following statements best describes how a color cathode-ray tube television works?

• A cathode beams electromagnetic light in the form of red, green, and blue electrons at the inside of the screen.

• Electromagnetic chemicals on the inside of the screen attract electrons of different-colored wavelengths.

• An electromagnet guides three separate electron beams to light-emitting substances on the inside of the screen.

• A cathode emits red, green, and blue images; electromagnets mix the images on the back of the screen.

Which elements are these two televisions most likely to share?

• Phosphors

• A liquid crystal display

• A backlight

• A supply of ionized gas

As the screen size of a CRT TV increases, so does the tube's depth. What conclusion can you draw from this fact?

• CRT television screens can be much bigger than flat panel (screen) TVs.

• CRT television screens can be as big as plasma screens, but not as big as LCD screens.

• CRT television screens can be as big as LCD screens, but not as big as plasma screens.

• CRT television screens cannot be as big as flat-panel screens.

The crystals in an LCD television are helical, like DNA molecules. Which of the following also has a helical shape?

• 
• 
• 
• 

What is plasma?

• A gas with a specific color.

• A filtered light wave.

• An electrically charged gas.

• A rod-shaped crystal formation.

A light wave has to be moving at a specific orientation to pass through an LCD television's filter. In this sentence, what does "orientation" mean?

• Angle

• Depth

• Velocity

• Frequency

Instead of using phosphors, how do LCD televisions create different colors?

• With a backlight

• With color filters

• With special gases

• With liquid crystals

LCD TVs work by preventing light waves of a certain orientation from passing through a medium. Which of the following everyday objects can you infer might also use this process, known as polarization?

• A ball of cotton

• A flashlight

• A glass of milk

• A pair of sunglasses

How are LCD, plasma, and cathode-ray-tube television sets all similar?

• They all combine three colors of light to create images in many colors.

• They all require an antenna to pick up TV signals

• They all block out white light using various filters

• They all contain many sets of light-emitting diodes