Answer:
The wave length of the sound is 66 cm.
The separation between the speakers is 85 cm.
Explanation:
Given that,
Distance between the speakers = 19 cm
Reaching zero at separation = 52 cm
(a). We need to calculate the wave length of the sound
Using formula of wavelength
Put the value into the formula
The wave length of the sound is 66 cm.
(b). if the distance between the speakers continues to increase the intensity will again be a maximum when the separation between the speakers that produces a maximum has increased by one wave length
We need to calculate the separation between the speakers
Using formula of separation
The separation between the speakers is 85 cm.
Hence, The wave length of the sound is 66 cm.
The separation between the speakers is 85 cm.
Energy of motion is the literal definition of kinetic energy
Answer: speed of light in solid = 1.88 * 10^8 m/s
Frequency is constant
Explanation: The relationship between the velocity of light wave and wavelength is given by the formulae below
V = fλ
During refraction, the frequency of light is constant, thus we have that
V = kλ which implies that velocity is proportional to wavelength.
Hence, we have that
v1/ λ1 = v2/ λ2
Where v1 = velocity of light in air = 3 * 10^8 m/s
v2 = velocity of sound in solid
λ1 = wavelength of light in air = 670nm
λ2 = wavelength of light in solid = 420nm
By making v2 subject of formulae, we have that
v2 = v1 * λ2/ λ1
v2 = 3 * 10^8 * 420nm/ 670nm
v2 = 3 * 10^8 * 0.6268
v2 = 1.88 * 10 ^8 m/s
b)
During refraction the frequency of light wave is constant this is because light consist of photons which has energy. it energy needs to be constant and for energy (E=hf) to be constant, frequency would be constant too.