Shared by a Veda teacher · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Why can you see anything at all?
Reflection is the bouncing back of light into the same medium when it strikes a surface. Every object you can see is either giving out light or reflecting it into your eyes.
↳ Seeing = light from an object reaching your eyes, usually by reflection.
Five names you must know cold
↳ Every angle in optics is measured from the normal.
Two laws run this whole chapter
Whatever angle the light arrives at (measured from the normal), it leaves at exactly the same angle on the other side of the normal.
↳ ∠i = ∠r — always, on every surface.
A mirror cut from a sphere
↳ Concave converges, convex diverges — everything else follows.
Six words that unlock every diagram
↳ The principal axis is the line through P and C — all measurements ride on it.
The most-used relation in the chapter
Given R = 30 cm? Then f = 15 cm — instantly. Half the numericals in this chapter start with this one line.
↳ Focal length is always half the radius of curvature.
How light bounces off surfaces: the two laws of reflection, regular vs diffuse reflection, and the special properties of images formed by plane mirrors — virtual, erect, laterally inverted, and as far behind the mirror a...
~25 min · full explanation, examples & memory tricks in the app
Concave and convex mirrors: pole, centre of curvature, focus and the R = 2f relation; the four ray rules; and image formation for every object position — the table the board asks every year.
~35 min · full explanation, examples & memory tricks in the app
The New Cartesian sign convention, the mirror formula 1/v + 1/u = 1/f, and magnification m = −v/u = h′/h — with the sign-reading skills that turn formulas into full marks in numericals.
~40 min · full explanation, examples & memory tricks in the app
Why light bends when it changes medium: the laws of refraction, Snell's law, refractive index (absolute and relative), the glass-slab experiment, and the everyday illusions — bent pencils, raised coins, shallow pools.
~35 min · full explanation, examples & memory tricks in the app
Convex and concave lenses: the three ray rules, image formation for every object position, the lens formula 1/v − 1/u = 1/f, magnification m = v/u, and power P = 1/f in dioptres — the chapter's grand finale.
~40 min · full explanation, examples & memory tricks in the app
264 questions laddered from warm-up to topper-level, each with an explanation. A taste:
The angle of incidence is the angle between the incident ray and the:
Beginnernormal
All angles in reflection are measured from the normal — the perpendicular at the point of incidence.
According to the first law of reflection:
Beginner∠i = ∠r
The angle of incidence always equals the angle of reflection.
Which of these statements about the image in a plane mirror are correct? I. It is virtual and erect. II. It is the same size as the object. III. It is laterally inverted. IV. It lies as far behind the mirror as the object is in front. Which statements are correct?
IntermediateAll four
All four are genuine properties of a plane-mirror image, and together they describe it completely.
A plane-mirror image cannot be caught on a screen because:
Intermediatethe reflected rays never actually meet — they only appear to come from a point behind the mirror
That is precisely what makes an image virtual. No light really passes through the image position, so there is nothing at that place for a screen to catch.
100 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
