science and inventions 3
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- Which of these electromagentic waves has the shortest wavelength?
- X-rays
- When visible light is incident upon clear glass, atoms in the glass
- are forced into vibration
- Sunburns are produced by
- ultraviolet light
- The size of the pupil of your eye depends on
-
your mood
the brightness of light in the room - Which of the following can not travel a vacuum?
- a sound wave
- A pair of sunglasses and a pair of reading glasses are left in the sunlight. The hotter glasses would be the
- sunglasses
- The color of an opaque object is the same as the light that is
- reflected
- What color light is transmitted by a piece of blue glass?
- blue
- Complimentary colors are two colors that
- produce white light when added together
- Different colors of light correspond to different light
- frequencies
- A mixture of cyan and yellow pigments appears
- green
- The sky is blue because air molecules in the sky act as tiny
- resonators which scatter blue light
- Red sunsets are due to lower frequencies of light that
- survive being scattered in the air
- The greenish blue of water is evidence for the
- absorption of red light
- According to Huygen's Principle, every point on a wave
- behaves as a source of new waves
- Polarization is a property of
- transverse waves
- Light will not pass through a pair of polaroids when their aces are
- perpendicular
- Monochromatic light is light of a single
-
wavelength
frequency
color - Light from a lit match comes from
- electrons
- Light is emitted when an electron
- makes a transition to a lower energy level
- Compared to the energy put into a laser, the energy of the laser beam is
- less
- Light from a laser is
-
monochromatic
in phase
coherent - A watch dial that continues to glow after a week in the dark is almost certainly
- radioactive
- Infrared waves are often called heat waves because they
- induce resonance in molecules and increase internal energy in a substance
- In the process of fluorescence, part of the input energy immediately
- becomes internal energy and the rest lower frequency light