SHS M5A Post Test

Imagine that this piece of paper is illuminated with white light and appears red. You see red light because

• the paper absorbs red and reflects other visible wavelengths.

• the paper emits red light.

• the paper reflects red and absorbs other visible wavelengths.

• the paper disperses white light.

Red sunsets, blue moons, and milky-white skies

are mainly the result of

• refraction.

• reflection.

• dispersion.

• scattering.

The blue color of distant mountains is due primarily to

• diffraction of light.

• refraction of light.

• scattering of light.

• emission of light.

Which of the following would be true if the earth did not have an atmosphere?

• There would be fewer hours of daylight.

• The sky would always be black.

• The stars would be visible in the sky during the day.

• all of the above

The blue color of the sky is due to

• selective scattering of visible light by air molecules.

• the filtering effect of water vapor in the earth's atmosphere.

• reflection of sunlight off the earth's oceans.

• transmission of visible light through the ozone layer in the earth's stratosphere.

Which of the following are capable of producing a red sunrise or sunset?

• small suspended salt particles

• small suspended dust particles

• volcanic ash

• all of the above

If the setting sun appears red, you may conclude that

• the sun's surface temperature has cooled somewhat at the end of the day.

• only the longest waves of visible light are striking your eye.

• the next day's weather will be stormy.

• you will not be able to see the moon that night.

Which of the following phenomena is not produced by refraction?

• halos

• mirages

• crepuscular rays

• sundogs

What causes a mirage?

• scattering of light by air molecules.

• the bending of light by air of different densities.

• a thin layer of moist air near the ground.

• reflection of light from a hot surface.

Which of the following are caused by the bending of light through ice crystals?

• rainbows and halos

• halos and sundogs

• halos and the green flash

• sundogs and sun pillars