USE--practice final

USE--practice final - Name: _ Class: _ Date: _ ID: A final...

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Name: ______________________ Class: _________________ Date: _________ ID: A 1 final Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Consider two identical and symmetrical wave pulses on a string. Suppose the first pulse reaches the fixed end of the string and is reflected back and then meets the second pulse. When the two pulses overlap exactly, the superposition principle predicts that the amplitude of the resultant pulses, at that moment, will be what factor times the amplitude of one of the original pulses? a. 1 b. 8 c. 0 d. 2 e. 4 ____ 2. If an electron has a measured wavelength of 0.850 × 10 10 m, what is its kinetic energy? ( h = 6.63 × 10 34 J s, 1 eV = 1.6 × 10 19 J, and m e = 9.11 × 10 31 kg) a. 209 eV b. 55.0 eV c. 245 eV d. 147 eV e. 104 eV ____ 3. A convex mirror with focal length of 20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface? a. 22 cm b. 7.5 cm c. 30 cm d. 50 cm e. 15 cm ____ 4. A diffraction pattern is produced from a light source of wavelength 580 nm. The light goes through a single slit and onto a screen 1.0 m away. The first dark fringe is 5.0 mm from the central bright fringe. What is the slit width? (1 nm = 10 9 m) a. 0.24 mm b. 0.062 mm c. 0.10 mm d. 0.081 mm e. 0.12 mm ____ 5. A silicon monoxide ( n = 1.45) film of 100 nm thickness is used to coat a glass camera lens ( n = 1.56). What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10 9 m) a. 624 nm b. 492 nm c. 400 nm d. 505 nm e. 580 nm
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Name: ______________________ ID: A 2 ____ 6. A certain kind of glass has n blue = 1.650 for blue light and n red = 1.610 for red light. If a beam of white light (containing all colors) is incident at an angle of 30.0º, what is the angle between the red and blue light inside the glass? a. 1.63º b. 1.90º c. 1.81º d. 0.22º e. 0.45º ____ 7. An earthquake emits both P-waves and S-waves that travel at different speeds through the Earth. A P-wave travels at 8 000 m/s and an S-wave at 4 000 m/s. If P-waves are received at a seismic station
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USE--practice final - Name: _ Class: _ Date: _ ID: A final...

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