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Laabri

Science 8-2: Light and Optics Section 3.0 Quiz

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Last updated 3 months ago
18 Nsɛmmisa
Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

Audio supports have been added

If you find it beneficial you may use your own class notes to assist you in completing this assessment.

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1.

The arrows a) and b) -identified in the illustration- indicate the ...

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2.

As frequency increases, this will happen to the wavelength ...

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3.

White light is refracted through a device that breaks it into all the visible colors that make up white light. This device is called...

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4.

All the colors ROYGBIV of the visible

spectrum have different wavelengths. The color with the shortest wavelength is...

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5.

Rainbows are formed because of the refraction of white light in the sky. The two things necessary for a

rainbow to form are ...

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6.

The invisible spectrum has wavelengths that cover a very large range of electromagnetic radiation.

This type of electromagnetic energy can burn your skin, even though most of it is absorbed by ozone in

the Earth’s atmosphere. Is it...

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7.

The only type of radiation which can penetrate solid material and concrete walls is ...

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8.

Radar is an acronym for radio detection and ranging. These devices send out waves, which bounce

off objects and return (obeying the law of reflection). Older radar devices use radio waves, whereas modern radar devices use...

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9.

Ultraviolet light can kill living cells in humans. If babies are born with a liver condition, which makes

their skin yellow, they are placed under ultraviolet light to treat it. The skin condition is known as ...

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10.

Doctors use MRI (magnetic resonance imaging) machines to create pictures of the tissues inside the human body. The MRI machine uses these types of electromagnetic waves to produce images ...

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11.

Thomas Edison was the first to design light bulbs in the late 1800’s. They didn’t last very long because he used this as the filament ...

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12.

A fluorescent light bulb is a glass tube filled with a small amount of gas, such as mercury vapor. The inside of the tube is coated with a white powder called ...

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13.

Phosphorescence is slightly different from fluorescence. In phosphorescence, the energy that is used to produce the light is absorbed by the material and then given off later. These types of materials ...

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14.

Incandescent light bulbs produce 95% heat and only 5% visible light. Fluorescent light bulbs are much

more efficient, because they produce 80% heat and ...

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15.

When living organisms produce their own light it is called bioluminescence. The firefly produces its own light by using a light-producing organ on the underside of its body called a...

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16.

The primary colors of "light" are:

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17.

The "secondary" colors of light are:

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18.

In older television sets, the theory of color is put into practice. If you look closely at the screen, you will

see that it is made up of rows of...