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Question 1

Which of the following object does not emit light?

		a candle flame
		the Sun
		the Moon
		a burning coal

Question 2

Phenomena such as diffraction and interference can be most easily explained in terms of the

		ray model of light.
		particle model of light.
		wave model of light.
		photoelectric effect.

Question 3

If 1 is the incident ray, what is the angle of reflection?

		A
		B
		C
		D

Question 4

We explain light today

		mostly with particle models.
		mostly as a wave phenomenon.
		as having both wave and particle behavior.
		as something completely unknown.

Question 5

The Sun appears reddish as it sets because

		the Sun emits more radiation at longer wavelengths at sunset.
		more of the shorter, bluer wavelengths are scattered by the dust and haze.
		the Doppler shift lowers the frequency as a given spot on Earth rotates away from the Sun.
		more of the longer, redder wavelengths are scattered by the atmosphere.

Question 6

Increasing the temperature of a blackbody

		would increase the amount of radiation absorbed.
		has no effect on the properties of the blackbody.
		would increase the frequency and amount of radiation emitted.
		Both A and C

1 points

Question 7

Being nearsighted means that a deformation in the lens causes an image to

		be inverted
		form before it hits the retina
		form behind the retina
		form on the retina

1 points

Question 8

Moving objects

		have increase mass
		experience time more slowly
		have increased gravity
		all of the above

Question 9

When a light ray hits the border of a medium at an angle below the _________________ the light has total internal reflection and is used in applications such as fiber optics.

		critical angle
		reflected angle
		angle of refraction
		angle of incidence

Question 10

The image formed by a plane mirror is

		virtual
		real
		a result of diffuse reflection
		smaller than the object