Magnification
Physics ⇒ Light and Optics
Magnification starts at 10 and continues till grade 12.
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See sample questions for grade 12
A concave mirror forms an image 20 cm in front of the mirror when the object is placed 40 cm in front of it. What is the magnification?
A convex lens forms an image 30 cm from the lens when the object is placed 10 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 15 cm from the lens when the object is placed 5 cm from the lens. What is the magnification?
A lens forms an image that is three times the size of the object and inverted. What is the magnification?
A real, inverted image is formed by a lens. Is the magnification positive or negative?
A student observes that the image formed by a lens is virtual, erect, and larger than the object. What can be said about the magnification?
Define magnification in the context of optics.
Describe how the sign of magnification relates to the orientation of the image.
Explain why a convex mirror always produces images with magnification less than 1.
Explain why the magnification of a plane mirror is always +1.
If a concave mirror forms an image that is half the size of the object, what is the magnification?
If the height of an object is 4 cm and the height of its image is 12 cm, what is the magnification?
If the image distance is -30 cm and the object distance is -10 cm for a mirror, what is the magnification?
If the magnification of a lens is less than 1, what does it indicate about the image?
If the magnification produced by a mirror is +0.8, what can you say about the image?
If the object distance (u) is -20 cm and the image distance (v) is +40 cm for a lens, what is the magnification?
If the object height is 2 cm and the image height is -6 cm, what is the magnification?
The magnification produced by a mirror is -2. What does the negative sign indicate?
