Introduction to Waves - SS3 Physics Past Questions and Answers - page 3
What is wavelength?
The Wavelength of a wave refers to the distance between two adjacent crests or troughs along the wave. It is denoted by Lambda (λ) and is the measure of the wave’s spatial extent, enumerated in meters (m).
The wave equation helps us to___
Enumerate the fundamental parameters of waves
Calculate the velocity of waves only
To calculate the wavelength of waves only
Determine the direction in which the wave is travelling
The wave equation is applicable to___
Electromagnetic waves alone
Mechanical waves alone
Transverse and longitudinal waves
All forms of waves
According to the wave equation, the wavelength is___ related to velocity and __ related to frequency
Inversely, proportionally
Directly, inversely
Fractionally, directly
Proportionally, indirectly
If a wave has a wavelength of 5 m and a velocity of 156 m/s, what is its frequency?
780.1 Hz
31.2 m/s
780.1 m/s
31.2 Hz
For a wave with a frequency of 324 Hz, a wavelength of 12 m, its velocity is___
27 kHz
3.88 Hz
3.88 kHz
27,000 Hz
If a periodic pulse is traveling through the air with a velocity of 589 meter every 1 second at a frequency of 1.5 x 103Hz, what is its wavelength?
\(\lambda\ = \ v\ \div \ f\)
v = 589 m/s
f = 1.5 x 103Hz= 1,500 Hz (1.5 kHz)
substituting,
λ \(= \ 589\ \div \ 1,500\ = \ 0.39\ m\)
What is the frequency of a radio wave if its wavelength is 174 m while traveling with a velocity of 456 m/s through the air?
f = v ÷ λ
v = 456 m/s
λ = 174 m
substituting,
f = \(256 \div 174\) = 1.47 Hz