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HONOR PHYSICS STUDY GUIDE – CHAPTER 24 – THE WAVE NATURE OF LIGHT - page 2 / 4

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15.Two thin slits are 0.005 mm apart.  Monochromatic light falls on these slits, and produces a fourth order interference fringe at an angle of 23.2.  What is the wavelength of the light?

                    a)    1.97x10__6 m      b)    4.92x10__4 m     c)    492 nm      d)    492 m

16.Two thin slits are 0.05 mm apart.  Monochromatic light of wavelength 634 nm falls on the slits.  If there is a screen 6 m away, how far apart are adjacent interference fringes?

a)    7.6 cm      b)    7.6 m      c)    13.16 cm      d)    13.16 m

17.

A diffraction grating will only work if the wavelength of the light is larger than the distance between adjacent lines on the grating.

18.

When a light wave enters into a medium of different optical density,

a)       its speed and frequency change.

b)its speed and wavelength change.

c)

its frequency and wavelength change.

d)

its speed, frequency, and wavelength change.

19.When a beam of light (wavelength = 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its frequency

a)increases by a factor of 1.50.

b)is reduced to 2/3 its original value.

c)is unaffected.

d)none of the above.

20.When a beam of light (wavelength = 590 rim), originally traveling in air, enters a piece of glass (index of refraction 1.50), its wavelength

a)increases by a factor of 1.50.

b)is reduced to 2/3 its original value.

c)is unaffected.

d)none of the above.

21.The index of refraction of diamond is 2.42.  This means that a given frequency of light travels

a)2.42 times faster in air than it does in diamond.

b)2.42 times faster in diamond than it does in air.

c)2.42 times faster in vacuum than it does in diamond.

d)2.42 times faster in diamond than it does in vacuum.

22.     When a ray of light passes obliquely from one medium to another, which

                of the following changes?

  a) Direction of travel     b) Wavelength     c) Speed     d) All of the above

23.     Which color of light undergoes the greatest refraction when passing from

air to glass?

a)Redb) Yellowc) Greend) Blue

24.White light is monochromatic light.

25.When white light goes from air to glass, the green color component refracts more than the yellow color component.

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