True
fiber optics
The reason for the pole appearing bent when put inside a glass of water is refraction. When a ray of light travels through one medium to the other, it tends to bend or deviate from its original path. Thus a light ray in this case, travels from the air through water, and then again through air and reach the eyes. Thus, the light ray deviates from its original path causing this phenomenon.
The average mean speed of the molecules of air is faster in warm air than on cool air. Sound is transferred by collisions of molecules. Therefore sound waves will travel faster on warm air because collisions of molecules of air in warm air is greater.
If you mean that the light is in the glass, and the air is on the "outside", then yes. The other way it isn't possible; for total internal reflection, the material through which light travels must needs have a higher refractive index.
True.
window, because sound travels fastest through solids, liquids second, and gases last.
Blue light travels faster than red light through glass because blue light has a shorter wavelength and higher frequency, allowing it to pass through the glass with less scattering or absorption.
The denser the medium, the faster sound travels through it. Glass (silicon oxide) is fairly dense, and sound waves propagate through it faster than they do through air or water.
Sound travels faster through aluminum than glass because aluminum has a higher speed of sound due to its higher stiffness and density compared to glass.
Blue light travels faster in crown glass compared to red light.
Light travels faster in air compared to glass because the speed of light is inversely proportional to the refractive index of the medium. Air has a lower refractive index than glass, so light can move faster through air than through glass.
true
It is not. The speed of light in any material is inversely proportional to the refractive index of that material. The refractive index of glass depends on the glass and so the speed of light varies between 156 and 204 million metres per second. By contrast, the speed of light in vacuum is nearly 300 million metres per second.Even in pure water ice, light travels at nearly 229 million metres per second. So there is no evidence whatsoever to support the question's claim of "fastest through glass".
Yes, that is correct. (Slower than in a vacuum.)
No
No
Light travels fastest in a vacuum because there are no particles to slow it down. It slows down in air, even more in water, and even more in glass due to interactions with particles in those mediums.