Light waves are traveling through glass. If the wavelength of some part of the light wave is 4 x 10-7 m and the frequency of that light is 5 x 1014 Hz, what is the speed of light through the glass?
8 x 10-22 m/s
1 x 107 m/s
1.25 x 1021 m/s
2 x 108 m/s
B is the answer
To find the speed of light through the glass, we can use the equation:
speed of light = wavelength × frequency
Given that the wavelength of the light wave is 4 x 10^(-7) m and the frequency is 5 x 10^14 Hz, we can plug these values into the equation:
speed of light = (4 x 10^(-7) m) × (5 x 10^14 Hz)
Now, let's calculate the value:
speed of light = 2 x 10^8 m/s
Therefore, the speed of light through the glass is 2 x 10^8 m/s.
To find the speed of light through the glass, we can use the equation:
Speed of light (c) = Wavelength (λ) x Frequency (f)
Given:
Wavelength (λ) = 4 x 10^-7 m
Frequency (f) = 5 x 10^14 Hz
Now, we can plug in the values into the equation:
Speed of light (c) = (4 x 10^-7 m) x (5 x 10^14 Hz)
To perform the multiplication, we can simplify the expression:
Speed of light (c) = 20 x 10^7 m/s
If we convert the exponent to a decimal, we get:
Speed of light (c) = 2 x 10^8 m/s
Therefore, the speed of light through the glass is 2 x 10^8 m/s.
From the given options, the closest value to the correct answer is 2 x 10^8 m/s.