Physics Final Exam Multiple Choice
Questions Fully Solved.
A light wave travels from water (n = 1.33) into a light oil (n = 1.22). The frequency of light in the
water
is 5.27 X 10'* Hz. What is the frequency of the light when it is in the oil?
A. 1.36 X 10^14 Hz
B. 5.27 x10^14Hz
C. 3.55 X1 0^14 Hz
D. 7.01 x 10^14 Hz
E. 8.72 x 10" Hz - Answer Frequency does not change, answer is B
What is the speed of light in the oil in the previous question?
A 2.46 x 10^8 m/s
B. 2.59 X 10^8 m/s
C. 2.64 x 10^8m/s
D.2.75 x 10^8 m/s
E. 3.0 X 10^8 m/s - Answer given n, c - n=c/v, v=c/n, answer is A
A stretched rope has a blue dot drawn on it. Let's say that a nice wave of amplitude 4.3 cm,
wavelength
37 cm, and frequency 2.5 Hz is imposed on the rope. What total distance does the blue dot
move as
one wavelength passes by it?
A. 17.2 cm
B. 4.3 cm
C. 37 cm
D. 8.6 cm
E. the blue dot does not move - Answer one wavelength, dot moves up,down,up,down, 4.3
times 4=17.2, answer is A
Which of the following wavelengths in air is closest to blue light?
,E. 600 nm - Answer ROYGBIV, Violet is 400, indigo is 450, blue is 500, answer is C
Light is an example of a ________wave.
A. high frequency
B transverse
C. low amplitude
D. energetic
E. longitudinal - Answer light is transverse wave, oscillatory motion perpindicular to motion,
answer is B
The speed of a wave in a given medium depends on which of the following?
A. an inertia associated with the medium B. the size of the medium
C. a restoring force associated with the medium
D. both A and B
E. both A and C - Answer does not depend on size, but on inertia force and a restoring force,
answer is E
Which of the following lists the electromagnetic waves from longest wavelength to shortest
wavelength?
A. x-rays, ultraviolet, visible light
B. visible light, ultraviolet, x-rays
C. ultraviolet, x-rays, visible light
D. ultraviolet, visible light, x-rays
E. x-rays, visible light, ultraviolet - Answer VUX, visible to UV to x-rays, answer is B
A candle is placed near a plane mirror, as shown at right. At which point is the
mirror image of the candle formed?
A. A
B. B
C. C
D. D
E. E
, Two beams of light, one ted and one blue, enter a prism, as shown at right. Which of the
following statements is true concerning the light as it passes through the prism?
A. The blue light will bend more than the red light, since the blue light has a longer wavelength.
B. The red light will bend more than the blue light, since the red light has a longer wavelength.
C. The blue light will bend more than the red light, since the blue light has a shorter wavelength.
D. The red light will bend more than the blue light, since the red light has a shorter wavelength.
E. The ted and blue light will bend by the same amount, since all colors refract equally.
The red beam is above the blue beam - Answer blue light is beneath red, so it has shorter
wavelength, and it bends more. Answer is C
Which of the following statements must always be true?
A. A real object always has a real image.
B. A real object always has a virtual image.
C. Concave mirrors always produce virtual images.
D. Concave mirrors always produce inverted images.
E. Convex mirrors always produce virtual images. - Answer Convex- v- virtual image, answer is
E
The image of an object in a plane mirror is always .
A. upright
B. the same size as the object
C. virtual
D. Both A and B
E. All of A, B, and C - Answer Plane mirror, so size and position are same, also virtual, answer is
E
As the wavelength of light increases, the index of refraction of the light for many materials, such
as glass, quartz, and water, generally______________
A. approaches zero
B. oscillates up and down
C. gets larger
D. gets smaller
Questions Fully Solved.
A light wave travels from water (n = 1.33) into a light oil (n = 1.22). The frequency of light in the
water
is 5.27 X 10'* Hz. What is the frequency of the light when it is in the oil?
A. 1.36 X 10^14 Hz
B. 5.27 x10^14Hz
C. 3.55 X1 0^14 Hz
D. 7.01 x 10^14 Hz
E. 8.72 x 10" Hz - Answer Frequency does not change, answer is B
What is the speed of light in the oil in the previous question?
A 2.46 x 10^8 m/s
B. 2.59 X 10^8 m/s
C. 2.64 x 10^8m/s
D.2.75 x 10^8 m/s
E. 3.0 X 10^8 m/s - Answer given n, c - n=c/v, v=c/n, answer is A
A stretched rope has a blue dot drawn on it. Let's say that a nice wave of amplitude 4.3 cm,
wavelength
37 cm, and frequency 2.5 Hz is imposed on the rope. What total distance does the blue dot
move as
one wavelength passes by it?
A. 17.2 cm
B. 4.3 cm
C. 37 cm
D. 8.6 cm
E. the blue dot does not move - Answer one wavelength, dot moves up,down,up,down, 4.3
times 4=17.2, answer is A
Which of the following wavelengths in air is closest to blue light?
,E. 600 nm - Answer ROYGBIV, Violet is 400, indigo is 450, blue is 500, answer is C
Light is an example of a ________wave.
A. high frequency
B transverse
C. low amplitude
D. energetic
E. longitudinal - Answer light is transverse wave, oscillatory motion perpindicular to motion,
answer is B
The speed of a wave in a given medium depends on which of the following?
A. an inertia associated with the medium B. the size of the medium
C. a restoring force associated with the medium
D. both A and B
E. both A and C - Answer does not depend on size, but on inertia force and a restoring force,
answer is E
Which of the following lists the electromagnetic waves from longest wavelength to shortest
wavelength?
A. x-rays, ultraviolet, visible light
B. visible light, ultraviolet, x-rays
C. ultraviolet, x-rays, visible light
D. ultraviolet, visible light, x-rays
E. x-rays, visible light, ultraviolet - Answer VUX, visible to UV to x-rays, answer is B
A candle is placed near a plane mirror, as shown at right. At which point is the
mirror image of the candle formed?
A. A
B. B
C. C
D. D
E. E
, Two beams of light, one ted and one blue, enter a prism, as shown at right. Which of the
following statements is true concerning the light as it passes through the prism?
A. The blue light will bend more than the red light, since the blue light has a longer wavelength.
B. The red light will bend more than the blue light, since the red light has a longer wavelength.
C. The blue light will bend more than the red light, since the blue light has a shorter wavelength.
D. The red light will bend more than the blue light, since the red light has a shorter wavelength.
E. The ted and blue light will bend by the same amount, since all colors refract equally.
The red beam is above the blue beam - Answer blue light is beneath red, so it has shorter
wavelength, and it bends more. Answer is C
Which of the following statements must always be true?
A. A real object always has a real image.
B. A real object always has a virtual image.
C. Concave mirrors always produce virtual images.
D. Concave mirrors always produce inverted images.
E. Convex mirrors always produce virtual images. - Answer Convex- v- virtual image, answer is
E
The image of an object in a plane mirror is always .
A. upright
B. the same size as the object
C. virtual
D. Both A and B
E. All of A, B, and C - Answer Plane mirror, so size and position are same, also virtual, answer is
E
As the wavelength of light increases, the index of refraction of the light for many materials, such
as glass, quartz, and water, generally______________
A. approaches zero
B. oscillates up and down
C. gets larger
D. gets smaller
