The reason why an image formed by total internal reflection (TIR) appears brighter than an image formed by normal reflection is primarily due to how light is reflected and transmitted within the medium.
Total internal reflection occurs when light rays traveling within a medium encounter a boundary with a less dense medium at an angle greater than the critical angle. At this critical angle light is fully reflected back into the denser medium rather than being transmitted into the less dense medium. This phenomenon is commonly observed in situations where light travels from a denser medium such as water or glass to a less dense medium such as air.
In the case of TIR the light rays reflect internally within the denser medium and do not escape into the surrounding medium. As a result the light rays undergo multiple reflections and continue to bounce within the denser medium until they eventually exit the medium or are absorbed. This prolonged interaction and multiple reflections enhance the brightness of the image formed.
In comparison normal reflection occurs when light strikes a boundary between two mediums and follows the law of reflection resulting in the light being reflected at the same angle as the incident angle. In this case the light rays are not internally reflected and do not possess the same effect of multiple reflections seen in total internal reflection.
Therefore the cumulative effect of multiple internal reflections in total internal reflection leads to a brighter image as opposed to the image formed by normal reflection.
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The reason why an image formed by total internal reflection (TIR) appears brighter than an image formed by normal reflection is primarily due to how light is reflected and transmitted within the medium.
Total internal reflection occurs when light rays traveling within a medium encounter a boundary with a less dense medium at an angle greater than the critical angle. At this critical angle light is fully reflected back into the denser medium rather than being transmitted into the less dense medium. This phenomenon is commonly observed in situations where light travels from a denser medium such as water or glass to a less dense medium such as air.
In the case of TIR the light rays reflect internally within the denser medium and do not escape into the surrounding medium. As a result the light rays undergo multiple reflections and continue to bounce within the denser medium until they eventually exit the medium or are absorbed. This prolonged interaction and multiple reflections enhance the brightness of the image formed.
In comparison normal reflection occurs when light strikes a boundary between two mediums and follows the law of reflection resulting in the light being reflected at the same angle as the incident angle. In this case the light rays are not internally reflected and do not possess the same effect of multiple reflections seen in total internal reflection.
Therefore the cumulative effect of multiple internal reflections in total internal reflection leads to a brighter image as opposed to the image formed by normal reflection.
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