<transcript><audio_16>ray again reflects into the same medium and this phenomena of the ray which is reflecting back into the same medium is called as a total internal reflection now if you understand that total</transcript><caption><image_17>The image is a diagram that shows the relationship between two dimensions. The diagram is divided into two sections. The top section is labeled "Cladding medium" and the bottom section is titled "Core density medium". 

There are two lines in the diagram, one in red and one in blue, that intersect at the top and bottom of the diagram. The red line is labeled as "Coding medium" with a blue line intersecting at the bottom. The blue line has a red arrow pointing to the center of the red line, indicating the direction of the data flow.

The diagram also has two arrows, one on the left side of the image and the other on the right side, which are labeled as the core density medium. The arrows are connected by a thin line, and the red arrow is pointing towards the center. The text on the diagram explains that the image is related to the concept of cladding and how it affects the size and shape of the object.</caption><transcript><audio_18>internal reflection and the critical angle from this ray diagram so for example if the ray is traveling from the core to the cladding where core is a denser medium and cladding is the</transcript><transcript><audio_19>rarer medium so when the ray travel and incident at the interface between the core and cladding and transmitted through this or the refracted from this interface between core and cladding it will always bend</transcript><transcript><audio_20>from the normal and this is the our normal so it is bending away from the normal and when you increase this incident angle one stage will come as this ray is bending so</transcript><transcript><audio_21>it is bends such that it will pass through the interface between the core and cladding and whatever the angle will be created when the refractive tray is traveling through the interface between the core</transcript><transcript><audio_22>and cladding that angle we can say that as a critical angle now if you increase again the incident angle then the light will be reflect back into the same medium so this concept of total</transcript> ray again reflects into the same medium and this phenomena of the ray which is reflecting back into the same medium is called as a total internal reflection now if you understand that total internal reflection and the critical angle from this ray diagram so for example if the ray is traveling from the core to the cladding where core is a denser medium and cladding is the rarer medium so when the ray travel and incident at the interface between the core and cladding and transmitted through this or the refracted from this interface between core and cladding it will always bend from the normal and this is the our normal so it is bending away from the normal and when you increase this incident angle one stage will come as this ray is bending so it is bends such that it will pass through the interface between the core and cladding and whatever the angle will be created when the refractive tray is traveling through the interface between the core and cladding that angle we can say that as a critical angle now if you increase again the incident angle then the light will be reflect back into the same medium so this concept of total
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