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.
Answer 12 questions on Fundamentals of Light and Optical Phenomena.
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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