<span>Within the visible spectrum, our experience of red is associated with
the longest wavelengths visible to our eyes.
Our experience of violet is associated with the shortest wavelengths
visible to our eyes.
And all the other colors are associated with the wavelengths that are
intermediate between those two extremes.</span>
Answer:
C because it make sens
C the light wave traveled through ice and then through a Dimond.
Answer:
7.5 cm behind the mirror
Explanation:
Applying,
Using the real is positive convection: All real distance from the mirror are positive
1/f = 1/v+1/u................. Equation 1
Where f = focal length of the mirror, v = image distance, u = object distance
From the question,
f = -12 cm, u = 20 cm
substitute these value into equation 1
1/(-12) = (1/20)+1/v
(-1/12)-(1/20) = 1/v
1/v = (-5-3)/60
1/v = -8/60
v = -60/8
v = -7.5 cm
Hence the image is formed 7.5 cm behind the mirror.
1) am radio waves
The lowest and highest frequencies of the radio signals are:
The speed of the waves is the speed of light,
, so to find the corresponding wavelengths we can use the basic relationship between frequency, wavelength and speed of a wave:
where f is the frequency and
the wavelength.
The wavelength corresponding to the lowest frequency is:
while the wavelength corresponding to the highest frequency is
So, the range of wavelengths is [187.5-545] m.
2) fm radio waves
This time, the lowest and highest frequencies of the radio waves are:
So the corresponding wavelengths are:
Therefore, the range of wavelengths of the rm radio signals is [2.8-3.4] m.