Question for Group Work 7.109 Part A Select the sentences about the physical nat

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Question for Group Work 7.109 Part A Select the sentences about the physical nature of light that are true. Check ali that apply. The units of frequency are distance per second. Electromagnetic radiation can be characterized by wavelength, amplitude, and frequency. Light is electromagnetic radiation, a type of energy embodied in oscillating electric and magnetic fields. The presence of a variety of wavelengths in white light is responsible for the way we perceive colors in objects. 1, The more closely spaced the waves, that is, the longerer the wavelength, the more energy there is. Light in a vacuum travels at 3.00 × 108 mph Grass appears green because it reflects primarily the wavelength associated with green light and absorbs the others Blue light has a wavelength of 750 nm the longest wavelength of visible light, and red has a wavelength of 500 nm Submit My Answers Give Up

Explanation / Answer

a)

false, frequency is inverse of time

b)

true

c)

true, light is radiation

d)

true, white light has all visible colors

e)

false, the more closely they are, they have smaller wavelenght

f)

false, this is "meter per second"

g)

True,

h) false, blue light must have lower than 700 nm in order to be visible

red has 400 nm

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