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.
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 a change of the angle of light without a change of medium. Refraction is a change of the angle of light with a change of medium.
Actually it is refraction process and specifically indentified as total internal reflection. The condition for total reflection is that the ray has to traverse from denser medium to the rarer medium and the angle of incidence has to be more than the critical angle.
First we should know what will be happen when the light ray goes from denser medium to rarer medium and rarer medium to denser mdeium.... 1. The light refracted away from the normal (Denser to Rarer) 2. The light refracted towards the normal (Rarer to denser) So it is not possibel to get total internal reflection whan the light travel from rarer to denser medium...... Conditions to achieve to get TIR 1. The light should travel from denser mediumt to rarer medium 2. The angle of incidence at the interface should be greater than critical angle if you are not satisfied kindly mail me cramkum@gmail.com
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.
NO
Frequency is a function of the energy level of the photon. Changing the medium does not change that energy level.
phase angle of 0 degree
Any two media having different optical densities is necessary. The conditions for total internal reflection are: 1. Light must travel from the optically denser medium to the optically less dense one. 2. The angle of incidence is greater than the critical angle, which is the angle of incidence in the optically denser medium for which the angle of refraction is 90o.
Mirage is a good example which is seen due to refraction of light and especially due to total internal reflection. ============================ A semi-opposing opinion: No reflection is required for the creation of a mirage, only refraction. ============================= Hope you might have heard about the conditions for total internal relection to take place. 1) Ray has to traverse from denser to rarer 2) the angle of incidence is to be more than critical angle of the denser medium So in such a case the refraction phenomenon cannot take place and so all the energy to be refracted is sent back to the denser medium itself. Hence named as total internal reflection. Of course total internal reflection is totally different from ordinary reflection.
Reflection-when light change the direction of motion within same medium. Refraction-change of direction when moving to another medium.