When light travels from a medium with higher refractive index toward one with lower refractive index, sufficiently large incidence angles can prevent transmission and produce total internal reflection.
The effect is the operating principle behind optical fibres and many compact optical devices.
When light travels from a medium with higher refractive index toward one with lower refractive index, sufficiently large incidence angles can prevent transmission and produce total internal reflection.
When light travels from a medium with higher refractive index toward one with lower refractive index, sufficiently large incidence angles can prevent transmission and produce total internal reflection.
Choose a concrete case linked to Total internal reflection. Write down the known information, what you are trying to find, and the units. Then state the rule, model or trend you will use. If a calculation is involved, keep the units visible at every line; if it is conceptual, state what changes and what remains fixed.
A strong answer contains four things: the starting situation, the variable that changes, the direction or numerical result, and one check. The check can be a unit, an order of magnitude, a limiting case or a comparison with a familiar example.