F. Define each of the following in one sentence.
1. Reflection
2. Refraction
3. Dispersion
4. Lateral inversion
5. Normal
6. Multiple reflection
7. Myopia
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Answers
Answer:
1)Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves.
2)Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.
1) Reflection is the change in direction of a wave at a boundary between two different media, so that the wave moves back into the medium it came from.
2) Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows
3) Dispersion is defined as the spreading of white light into its full spectrum of wavelengths.
4) Lateral inversion is the effect produced by a plane mirror in reversing images from left to right. This is the reason why ambulance is written laterally inverted so that its image is aligned properly.
5) The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection.
6) Multiple reflection of light is the reflection of light back and forth several times between reflecting surfaces.
7) the ability to see close objects more clearly than distant objects is myopia . Myopia can be caused by a longer-than-normal eyeball or by any condition that prevents light rays from focusing on the retina.
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