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Physics
UTME / JAMB 2004
Waves and Optics
Solution
What types of mirror are capable of producing parallel beams of light such as those arising from the headlamps of a car?
A
Parabolic mirrors
B
Plane mirrors
C
Cylindrical mirrors
D
Spherical mirrors
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Parabolic mirrors (specifically concave parabolic reflectors) are designed so that when a light source is placed at their focal point, the reflected rays emerge as a tight, parallel beam
Source: Myschool Past Questions Archive (Record #12903)
Physics
UTME / JAMB 2004
Waves and Optics
Solution
What happens to the rays in a parallel beam of light?
A
They diverge as they travel
B
they intersect
C
They converge as they travel
D
They meet at infinity.
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Parallel rays neither converge nor diverge. They remain the same distance apart and are considered to meet at infinity.
Source: Myschool Past Questions Archive (Record #12905)
Physics
UTME / JAMB 2004
Waves and Optics
Solution
A ray of light makes an angle of 35o with a plane mirror. What is the angle of reflection?
A
35o
B
55o
C
70o
D
65o
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
35o =35o = 70o
180 - 70 = 110
110/2 = 55o
Source: Myschool Past Questions Archive (Record #12911)
Physics
UTME / JAMB 2004
Waves and Optics
Solution
A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity
A
Convex lens
B
Binoculars
C
Concave lens
D
Plane glasses
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
A person with this condition is said to be short-sighted. Hence, to correct it, a concave lens is used for correction.
Source: Myschool Past Questions Archive (Record #12912)
Physics
UTME / JAMB 2004
Waves and Optics
Solution
The pitch of a sound note depends on
A
timbre
B
frequency
C
harmonics
D
quality
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
The pitch of a note depends on the frequency and wavelength of the source of the sound. a high-frequency (low wavelength ) produces a high-pitched note and a low-frequency ( high wavelength) produces a low-pitched note.
Source: Myschool Past Questions Archive (Record #12913)
Physics
UTME / JAMB 2004
Waves and Optics
Solution
If u is the object distance and v the image distance, which of the following expressions gives the linear magnification produced by a convex lens of focal length f?
A
u/f - f
B
u/v + f
C
v/f + 1
D
v/f - 1
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Magnification, M = v/u = v (1/u)
And for the Lens formula 1/u + 1/v = 1/f
=> 1/u = 1/f - 1/v
∴M = V(1/u)
= V(1/f - 1/v) = v/f - v/v = v/f - 1
∴M = v/f - 1
Source: Myschool Past Questions Archive (Record #12918)
Physics
UTME / JAMB 2004
Waves and Optics
Diagram
Solution
The phase difference between waves P and q in the diagram above is
Attached Figure / Diagram
A
2π
B
π
C
π/4
D
π/2
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
The phase difference between P and Q is \(\frac{\pi}{2}\)
Source: Myschool Past Questions Archive (Record #12931)
Physics
UTME / JAMB 2004
Waves and Optics
Solution
Transverse waves can be distinguished from longitudinal waves using the characteristic of
A
diffraction
B
refraction
C
polarization
D
reflection
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Polarization is the only wave property that applies only to transverse waves.
Source: Myschool Past Questions Archive (Record #12944)
Physics
WAEC / WASSCE 2004
Waves and Optics
Diagram
The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave
Attached Figure / Diagram
A
20 Hz
B
10 Hz
C
5 Hz
D
4 Hz
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #34270)
Physics
WAEC / WASSCE 2004
Waves and Optics
The basic difference between a transverse wave and a longitudinal wave travelling in the same direction in a medium is in the
A
amplitude of the wave
B
wavelength of the wave
C
direction of vibration of the particles of the medium
D
period of vibration of the particle of the medium
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #34334)
Physics
WAEC / WASSCE 2004
Waves and Optics
A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?
A
dispersion
B
refraction
C
interference
D
diffraction
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #34342)
Physics
WAEC / WASSCE 2004
Waves and Optics
The image of an optical pin placed at the principal focus of a concave mirror will be formed
A
between the principal focus and the pole
B
at the centre of the curvature
C
between the principal focus and the centre of curvature
D
at infinity
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #34343)
Physics
WAEC / WASSCE 2004
Waves and Optics
During a thunderstorm, lightning and thunder occurred simultaneously in the atmosphere. An observer on the earth surface's sees the lightning flash shortly before hearing the thunder. This is because the
A
atmospheric pressure is higher at the surface than at the higher altitudes
B
speed of sound is less than that of light
C
temperature of the atmosphere decreases with altitude
D
atmospheric density decreases with altitude
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #34355)
Physics
WAEC / WASSCE 2004
Waves and Optics
Solution
A girl stand 80m away from a tall cliff and blows a whistle. If the speed of sound in air is 330ms-1, how long would it take for her to hear the echo of the sound?
A
2.062s
B
0.970s
C
0.485s
D
0.242s
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
t = \(\frac{2x}{v} = \frac{2 \times 80}{330} = 0.485s\)
Source: Myschool Past Questions Archive (Record #34364)
Physics
WAEC / WASSCE 2004
Waves and Optics
The sound from a vibrating tuning sound is when the tip of its stem is placed on a wooden table than when in air because
A
the friction between the table and the tuning fork generates additional energy
B
air molecules obsorb sound wave but wood transmit sound waves
C
the table increases the frequency of the turning fork
D
a large mass of air is set into vibration by the table
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #34383)