Science study guide

The highest frequency electromagnetic waves may have frequencies of trillions of hertz.

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NGSS.HS-PS4-1

Which statement about a reflecting telescope is true?

• It uses a concave lens in the eyepiece to enlarge the image.

• It uses a plane mirror to reflect light into the eyepiece.

• It uses a convex lens to collect light from distant objects.

• It uses a convex mirror to collect and focus light.

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NGSS.MS-PS4-2

All electromagnetic radiation is dangerous except for light.

Answer explanation

All EM radiation is dangerous!!!

Structures of the human eye collect light and focus image on the ______?

Answer explanation

remember: the retina is in the back of the eye,so it most likely reflects everything it sees. that's why blue-eyed people's eyes appear red in pictures using flash.

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NGSS.MS-PS4-2

The shortest wavelength of visible light appears to the human eye as the color ____

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NGSS.HS-PS4-1

the optical instrument that produces a beam of very focused light is a

• laser

• telescope

• microscope

• none of these.

Answer explanation

dummy. what ACTUALLY produces light? Lasers emit a beam stupid.

the images formed by the human eye are real, reduced, and upright.

a banana appears to be yellow because it absorbs only yellow light.

what color does the shortest wavelength of visible light appear to the human eye?

a compound microscope contains

• convex lenses

• two of these

• convex mirror

• plane mirror