This is a general property of waves. If you have waves reflecting off a clamped point (like waves running on a string that you pinch hard at one point), the waves get phase inverted. The reason is the principle of superposition and the condition that the amplitude at the clamped point is zero. The sum of the reflected and transmitted wave must be the amplitude of oscillation at all points, so that the reflected wave must be phase inverted to cancel the incoming wave.
This property is continuous with the behavior of waves going from a less massive string to a more massive string. The reflection in this case has opposite phase, because the more massive string doesn't respond as quickly to the tension force, and the amplitude of oscillation at the contact point is less than the amplitude of the incoming wave. This means (by superposition) that the reflected wave must cancel part of the incoming wave, and it is phase reflected.
When a wave goes from a more massive string to a less massive string, the less massive string responds with less force, so that the derivative at the oscillating end is flatter than it should be. This means that the reflected wave is reflected in phase with the incoming wave, so that the spatial derivative of the wave is cancelled, not the amplitude reduced.
In optical materials of high density are analogous to strings with a higher density, hence the name. If you go into a material with low speed of light, the time derivative term in the wave-equation is suppressed, so that the field responds more sluggishly, the same way that a massive material responds more sluggishly to tension pulls. Since the eletric field response in these materials is reduced, the reflected wave is phase inverted to make the sum on the surface less, as is appropriate to match with the transmitted wave.
a medium. but longitudinal waves do not have to travel through a medium. This is why transverse waves cannot vibrate through space.a medium. but longitudinal waves do not have to travel through a medium. This is why transverse waves cannot vibrate through space.
Denser mediums when considering the speed of light are materials like liquid water, gases and plasmas under extreme pressure, such as are found in Jupiter and the sun
refracted False
when it is dry and hot the air acts as denser medium,when its a wet day the air around act as rarer medium.........sound travels faster in rarer medium than denser medium
Transverse wave longitudinal wave-hint back and forth
no. if the medium is denser, the reflection of light would not do it.
When a wave enters from a rarer medium to a denser medium, it undergoes a phase change of 180 degrees because the wave experiences a reflection at the boundary. This reflection causes the wave to invert upon entering the denser medium. This change in phase is a result of the difference in the refractive indices of the two media.
An optical denser medium refers to a material with a higher refractive index compared to the surrounding medium. This causes light to change direction when it passes from one medium to another, resulting in effects like refraction and total internal reflection. Examples of optical denser mediums include glass and water.
No, total internal reflection can only occur when light travels from a denser medium to a less dense medium. If light travels from a less dense medium to a denser medium, it will refract towards the normal rather than being internally reflected.
No, there is no phase change that occurs when a sound wave refracts from a denser medium to a rarer medium. The wavelength and frequency of the wave may change due to the change in speed, but the phase remains the same.
it is not the angle of total reflection, it is the critical angle. and when the angle of incidence is greater than the critical angle, total internal reflection takes place and as it is necessary for total internal reflection to take place that the ray must travel from denser to rarer medium so, when it occurs, the ray is reflected bach into the denser medium.
Light must travel from the optically denser medium to the optically less dense one. For total internal reflection to occur, the angle of incidence in the optically denser medium must be greater than the critical angle of that medium. The critical angle is that angle of incidence in the optically denser medium for which the angle of refraction is 90o.
Reflection is the bouncing back of light or sound waves when they hit a surface, changing direction but not entering the surface. Refraction is the bending of light waves as they pass from one medium to another medium with a different density, causing a change in speed and direction.
Total internal reflection occurs when light is traveling from a denser medium to a less dense medium and the angle of incidence is greater than the critical angle. This causes the light to be reflected back into the denser medium rather than refracting out. It is commonly seen in situations like fiber optics.
Yes, when light travels from a denser medium to a rarer medium and strikes the interface at an angle greater than the critical angle, total internal reflection can occur. In this case, the light ray reflects back into the denser medium instead of refracting into the rarer medium.
Frequency is a function of the energy level of the photon. Changing the medium does not change that energy level.
True. When a wave passes from a less dense medium to a denser one, most of the wave energy is reflected back into the less dense medium, causing partial reflection and refraction of the wave.