# 20 physics questions

1.

As the pendulum swings from position A to position B, what is the relationship of kinetic energy to potential energy (neglect friction)? (5 points)

 The kinetic energy increase is equal to the potential energy decrease. The potential energy increase is equal to the kinetic energy decrease. The kinetic energy and potential energy remain the same. The kinetic energy increase is more than the potential energy decrease.
2.

A lens that is thicker in the middle and thinner on the ends is a (5 points)

 converging lens diverging lens
3.

Which angle is the angle of reflection? (5 points)

 1 2 3
4.

Which angle is the angle of refraction? (5 points)

 1 2 3
5.

Which of the rays drawn above would be correct as the light goes from the air into the water? (5 points)

 A B C
6.

The index of refraction for Lucite is 1.5. What is the approximate speed of light in the Lucite? (5 points)

 1.5 E8 m/s 2.0 E8 m/s 3.0 E8 m/s 4.5 E8 m/s
7.

The angle of incidence (5 points)

 must equal the angle of reflection is always less than the angle of reflection is always greater than the angle of reflection may be greater than, less than, or equal to the angle of reflection
8.

Polarization can be observed (5 points)

 for all types of waves for light waves for short wavelengths only at night
9.

The separation of white light into its component colors by means of a triangular prism is known as (5 points)

 dispersion interference reflection
10.

The three types of cones in the human eye are (5 points)

 red, yellow, green red, green, blue red, blue, cyan yellow, cyan, magenta
11.

Monochromatic light passes through two parallel narrow slits and forms an interference pattern on a screen. As the distance between the two slits is decreased, the distance between light bands in the pattern on the screen will (5 points)

 decrease increase remain the same
12.

A beam of red light is made to pass through two slits that are 3.55 E-3 meters apart. On a screen 2.25 meters away from the slits, an interference pattern appears with bands of light separated by 1.25 E-4 meters. What is the wavelength of the light? (5 points)

 1.97 E-7 m 0.197 m 9.98 E-7 m 5.07 E 6 m
13.

Monochromatic light with a wavelength of 6.4 E -7 meter passes through two narrow slits, producing an interference pattern on a screen 4.0 meters away. The first order bright band lines are 2.0 E -2 meters away from the central bright maxima.What is the distance between the slits? (5 points)

 1.3 E -4 m 8.0 E -6 m 3.2 E -9 m 7.8 E3 m
14.

The velocity of a wave with a wavelength of 4.700 m and frequency of 54.00 Hz is (5 points)

 11.49 m/s 25.38 m/s 33.85 m/s 114.9 m/s 253.8 m/s
15.

Betty and Ahmed are standing 4.0 m in front of a camera, which has a converging lens with a focal length of 0.045 m. The distance between the image and the lens is (5 points)

 0.044 m 0.046 m 0.44 m 0.46 m 0.58 m
16.

If the medium moves perpendicular to the direction of the wave motion, the wave is classified as a longitudinal wave. (5 points)

 True False
17.

The focal length of a lens is determined by the curve of the lens and the material that the lens is made from. (5 points)

 True False
18.

Match the object positions with the image positions for a convex lens. (4 points)

 abcd 1 abcd 2 abcd 3 abcd 4
 a. At 2f
 b. Beyond 2f
 c. Between f and 2f
 d. No image
19.

Match the terms with their definitions. (4 points)

 abcd 1 Amplitude abcd 2 Period abcd 3 Frequency abcd 4 Wavelength
 a. The number of complete waveforms passing a given point per unit time
 b. The distance from the equilibrium position of the medium to a point of its maximum movement
 c. The time required for a single wave to pass through a given point
 d. The distance from one point of a wave to the corresponding point on the next wave
 20 A ray of light traveling in air strikes the surface of water at an angle of incidence of 35 degrees. Calculate the angle of refraction of the light in water. Index of refraction of water is 1.33, while that for air is 1.00. Remember to identify all of your data, write the equation, and show your work. (5 points)

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20 physics questions was first posted on January 18, 2021 at 12:47 am.