<transcript><audio_26>so from the snail's law if you want to calculate the value of critical angle as we know that from these are the different stages as i have explained in the previous slide how the light will be</transcript><caption><image_27>The image is a screenshot of a math worksheet with a question and answer. The question is asking the user to calculate the angle of an angle of a given object and find the reflection of the object on the right side of the image. 

The answer is written in black text on a white background. Below the question, there is a line graph with two points, one on the left side and one in the center. The line graph is a straight line with a point at the end and a line at the top. The x-axis of the graph is labeled with the value of the point, and the y-axis is labeled as the angle.

There is also a text box below the graph that explains how to use the answer to the question. The text box has a blue arrow pointing to the right, indicating that the answer can be used to answer the questions.</caption><transcript><audio_28>reflect back into the same medium and from the snail's law for example this n1 sine theta c that is the critical angle where the refracted ray will be traveled through the</transcript><transcript><audio_29>interface between the core and cladding and that critical angle will be this if this is a critical angle this will be the 90 angle this reflected angle will be 90 so that here it is written as a 99 from if we</transcript><transcript><audio_30>arrange this equation as sine theta is equal to n2 upon n1 so theta c will equal to sine inverse of n2 upon n1 this is how you will be able to</transcript> so from the snail's law if you want to calculate the value of critical angle as we know that from these are the different stages as i have explained in the previous slide how the light will be reflect back into the same medium and from the snail's law for example this n1 sine theta c that is the critical angle where the refracted ray will be traveled through the interface between the core and cladding and that critical angle will be this if this is a critical angle this will be the 90 angle this reflected angle will be 90 so that here it is written as a 99 from if we arrange this equation as sine theta is equal to n2 upon n1 so theta c will equal to sine inverse of n2 upon n1 this is how you will be able to
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