Refraction?is the bending of a wave when it enters a medium where its speed is different. The?refraction?of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.
7) Refraction is
Answer is:
Change of direction of propagation of light at the interface of two media as light passes from one medium to another
Explanation:
Related Optics MCQ with Answers
Answer is:
The ratio of the sine of the angle of incidence to the sine of angle of refraction is constant
Explanation:
a law stating that the ratio of the sines of the angles of incidence and refraction of a wave are constant when it passes between two given media.
Answer is:
One interfaces
Explanation:
For a rectangular slab, refraction takes place at one inerface
Answer is:
Denser to rarer medium
Explanation:
Total internal reflection can take place only if light is travelling from a denser medium to a less dense medium, such as from glass to air or from water to air.
When light travels from a denser medium to a less dense medium, the speed of light decreases and the angle of refraction increases. As the angle of incidence increases, there is a critical angle beyond which the refracted angle becomes 90 degrees and the light is completely reflected back into the denser medium. This phenomenon is called total internal reflection.
Total internal reflection has many practical applications, such as in optical fibers, where light is reflected internally along the length of the fiber to transmit information, and in prism-based optical instruments like binoculars and cameras, where it is used to bend light and create an image.
Answer is:
tan(incidence angle) = 1/n21,?n21?= refractive index travelling from 2 to 1
Explanation:
the complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.