Magnification
Physics ⇒ Light and Optics
Magnification starts at 10 and continues till grade 12.
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See sample questions for grade 10
A student observes that the image formed by a lens is upright and larger than the object. What can be said about the magnification?
Explain how you can determine the nature of an image (real or virtual) using the sign of magnification.
Explain why the magnification of a plane mirror is always 1.
Explain why the magnification of a virtual image formed by a convex lens is always positive.
A concave mirror forms an image 20 cm behind the mirror when the object is placed 10 cm in front of it. What is the magnification?
A convex lens forms an image 15 cm from the lens when the object is placed 5 cm from the lens. What is the magnification?
A convex mirror forms an image 5 cm behind the mirror when the object is placed 20 cm in front of it. What is the magnification?
A lens forms an image 10 cm high from an object 2 cm high. What is the magnification?
A real image is always formed when the magnification is (1) positive (2) negative (3) zero (4) greater than 1.
Which of the following best describes the magnification produced by a plane mirror? (1) Always less than 1 (2) Always more than 1 (3) Always equal to 1 (4) Can be any value
Which of the following is NOT a possible value for magnification? (1) 2 (2) -1 (3) 0 (4) 0.5
Which of the following is the correct formula for magnification in terms of image and object distances? (1) m = v/u (2) m = u/v (3) m = v+u (4) m = v-u
Fill in the blank: If the image is inverted, the magnification is _________.
Fill in the blank: If the magnification produced by a mirror is less than 1, the image is ________ than the object.
Fill in the blank: The magnification formula for a mirror is m = _________.
Fill in the blank: The magnification of a plane mirror is always _________.
True or False: A magnification of -2 means the image is inverted and twice the size of the object.
True or False: Magnification can be greater than, less than, or equal to 1.
True or False: Magnification can be used to determine whether an image is real or virtual.
True or False: The magnification of a convex lens can be negative.
