Reflection of Light — Flashcards
Maharashtra Board · Class 9 · Science
24 flashcards for Reflection of Light (Maharashtra Board Class 9 Science) to test yourself on key terms and facts.
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What is a mirror? Define it in scientific terms.
Answer
A mirror is a reflecting surface that reflects light and creates clear images. It is made by coating the back surface of a flat, smooth glass piece with a thin reflecting film of aluminum or silver, f…
What are the two main types of mirrors? Give one example of each.
Answer
The two main types of mirrors are: 1) Plane mirrors - flat mirrors used in homes and bathrooms, 2) Spherical mirrors - curved mirrors like concave mirrors (shaving mirrors) and convex mirrors (car rea…
What is lateral inversion? Give an example.
Answer
Lateral inversion is when the image appears reversed left to right in a mirror. For example, when you hold a book in front of a mirror, the letters appear backwards. If you raise your right hand, the …
What are the characteristics of an image formed by a plane mirror?
Answer
Images formed by plane mirrors are: 1) Virtual (cannot be obtained on screen), 2) Erect (upright), 3) Same size as object, 4) Laterally inverted, 5) Distance of image from mirror equals distance of ob…
If two plane mirrors are placed at an angle θ, how many images are formed? State the formula.
Answer
Number of images formed = (360°/θ) - 1, where θ is the angle between the mirrors. For example, if θ = 60°, then number of images = (360°/60°) - 1 = 6 - 1 = 5 images.
What is the minimum height of a plane mirror needed to see the full image of a person?
Answer
The minimum height of a plane mirror needed to see the full image of a person is half the height of the person. This is because the mirror only needs to reflect light from the top of the head and the …
What is a concave mirror? Describe its shape and reflecting surface.
Answer
A concave mirror is a spherical mirror whose inner (curved-in) surface is the reflecting surface. It curves inward like the inside of a spoon. It is also called a converging mirror because it focuses …
What is a convex mirror? Describe its shape and reflecting surface.
Answer
A convex mirror is a spherical mirror whose outer (curved-out) surface is the reflecting surface. It curves outward like the back of a spoon. It is also called a diverging mirror because it spreads ou…
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