Motorcyclists can make themselves more visible at night by
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At night, you are farther away form the sun than during the day. What's more, the force exerted by the sun on you is downward into Earth at night and upward into the sky during the day. If you had a sensitive enough bathroom scale, would you appear to weigh more at night than during the day?
Which of the following forms of light can be observed with telescopes at sea level?
A. X raysB. ultraviolet lightC. visible lightD.infrared lightE. radio waves and visible light
A popular kitchen appliance produces electromagnetic radiation with a frequency of 2450 MHz. With reference to Figure 6.4, answer the following:
(a) Estimate the wavelength of this radiation.
(b) Would the radiation produced by the appliance be visible to the human eye?ย
(c) If the radiation is not visible, do photons of this radiation have more or less energy than photons of visible light?
(d) Propose the identity of the kitchen appliance.
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