Reflection of light at curved surfaces
Telangana Board · Class 10 · Physical Sciences
Flashcards for Reflection of light at curved surfaces — Telangana Board Class 10 Physical Sciences. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is a spherical mirror and what are its two types?
Answer
A spherical mirror is a curved reflecting surface that forms part of a hollow sphere. Two types: (1) Concave mirror - curved inward like inner surface of a spoon, (2) Convex mirror - curved outward li…
Define: Centre of curvature (C), Pole (P), and Principal axis of a spherical mirror.
Answer
Centre of curvature (C): Centre of the sphere from which the mirror is cut. Pole (P): Geometrical centre/mid-point of the mirror. Principal axis: Horizontal line passing through the centre of curvatur…
What is the focus (F) and focal length (f) of a concave mirror?
Answer
Focus (F): The point on the principal axis where parallel rays of light converge after reflection from a concave mirror. Focal length (f): Distance from the pole to the focus. Relationship: f = R/2 wh…
How does the focus differ between concave and convex mirrors?
Answer
Concave mirror: Parallel rays converge at a real focus in front of the mirror. Convex mirror: Parallel rays appear to diverge from a virtual focus behind the mirror. Both follow f = R/2 but with diffe…
State the three rules for drawing ray diagrams in concave mirrors.
Answer
Rule 1: Ray parallel to principal axis reflects through focus. Rule 2: Ray passing through focus reflects parallel to principal axis. Rule 3: Ray passing through centre of curvature reflects back alon…
State the three rules for drawing ray diagrams in convex mirrors.
Answer
Rule 1: Ray parallel to principal axis appears to come from focus after reflection. Rule 2: Ray directed towards focus reflects parallel to principal axis. Rule 3: Ray directed towards centre of curva…
What type of image is formed when an object is placed between pole and focus of a concave mirror?
Answer
Virtual, erect, and enlarged image is formed behind the mirror. This image cannot be caught on a screen and is visible only when looking into the mirror. Used in shaving mirrors and dental mirrors.
What happens to the image when an object is placed beyond the centre of curvature of a concave mirror?
Answer
A real, inverted, and diminished image is formed between focus and centre of curvature. This image can be caught on a screen.
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