Light — definition?
A form of energy that makes objects visible.
Properties of light — key?
Reflection, refraction, dispersion.
Reflection law — statement?
Angle of incidence equals angle of reflection.
Image in plane mirror — type?
Virtual, erect, same size as object.
Lateral inversion — effect?
Left and right are reversed in mirror images.
Multiple images — formula?
n = 360°/θ - 1 (if integer).
Spherical mirror — types?
Concave and convex.
Mirror formula — equation?
1/f = 1/v + 1/u.
Refraction — mechanism?
Bending of light passing between media.
Refractive index — formula?
n = sin i / sin r.
Real vs apparent depth — ratio?
Real depth / apparent depth = refractive index.
Lenses — types?
Convex (converging), concave (diverging).
Concave mirror — image?
Can form real or virtual images.
Convex mirror — image?
Virtual, erect, diminished.
Mirror formula — purpose?
Calculates image/object distances and focal length.
Light — travel?
In straight lines, reflected, refracted, dispersed.
Refraction — causes?
Change in light speed in different media.
Refractive index — significance?
Indicates how much light bends in a medium.
Real depth — relation?
Real depth = apparent depth × refractive index.
Apparent depth — cause?
Refraction makes objects seem closer underwater.
Lenses — converging?
Convex, used in magnifiers, hypermetropia.
Lenses — diverging?
Concave, used in myopia correction.
Lateral inversion — occurs?
In plane mirrors, left-right reversal.
Number of images — in two mirrors?
n = 360°/θ - 1, if integer.
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1. What is light fundamentally considered to be?
2. Who is the scientist associated with the property of light called the 'refractive index' and the law of refraction?
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