<span>The answer is 15 centimeters. The waves with the
smallest wavelengths (also highest
frequency) have the least capacity to diffract around objects hence have a
shadowing effect, behind the object, especially if the wavelength is small
compared to the object. This is also the reason why high-frequency electromagnetic waves do not have a good reach in mountainous
regions. </span>
Answer:
Explanation:
Given
Diver is at a depth of inside the water
As we go down pressure increases due to the weight of liquid column above us
Pressure difference is given by
Where =density of liquid
h=depth
g=acceleration due to gravity
So external-internal pressure difference is
Only B is correct.
The index of refraction is lower in the second medium than it was in the first ✓
According to the question : Which statement is true of light when it speeds <em>up</em> on entering another medium?
If the refractive index was greater than the 1st medium (like in answer A) light speed reduces.
But if the refractive index was lower, speed of light increases.
Answer:
the state of giving off light or glow.