The mirror used by a dentist to check the teeth of a patient is concave. Concave mirrors provide a magnified image, which helps the dentist see a larger and clearer view of the teeth and gums, aiding in better examination ...
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A diverging lens is one that spreads rays of light. It is thinner at the center than at the edges, causing parallel rays of light passing through it to diverge away from a focal point, where the virtual image is ...
The unit of the power of the lens is diopter. It measures the refractive power of a lens, indicating how strongly the lens converges or diverges light. It is defined as the reciprocal of the focal length in meters.
Total internal reflection occurs when light travels from a denser medium to a rarer medium, with an angle of incidence greater than the critical angle. This phenomenon causes the light to be completely reflected back into the denser medium, rather ...
Red light is used for danger signals because it is less scattered compared to other colors. This characteristic allows red light to travel longer distances without dispersing, ensuring that warning signals remain clearly visible even in conditions where visibility may ...