Image Formation by Lenses
Physics ⇒ Light and Optics
Image Formation by Lenses starts at 8 and continues till grade 12.
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See sample questions for grade 9
A convex lens forms a diminished, real, and inverted image. Where is the object placed?
A convex lens forms an image that is the same size as the object. Where is the object placed?
A lens forms an image that is real, inverted, and the same size as the object. What is the object distance relative to the lens?
A lens forms an image that is virtual, erect, and larger than the object. Which lens is it and where is the object placed?
A concave lens of focal length 20 cm forms an image 8 cm from the lens. What is the object distance?
A convex lens has a focal length of 20 cm. An object is placed 60 cm from the lens. Calculate the image distance.
A lens forms an image 15 cm from the lens when the object is placed 10 cm from it. If the image is on the same side as the object, what is the focal length?
A student observes that the image formed by a lens is always smaller than the object, regardless of the object's position. What type of lens is it?
Which of the following best describes the image formed by a convex lens when the object is placed between F and the lens?
(1) Real, inverted, diminished
(2) Virtual, erect, magnified
(3) Real, erect, magnified
(4) Virtual, inverted, diminished
Which of the following is a converging lens?
(1) Concave lens
(2) Convex lens
(3) Plano-concave lens
(4) Biconcave lens
Which of the following is NOT a property of the image formed by a concave lens?
(1) Virtual
(2) Erect
(3) Magnified
(4) Diminished
Which of the following is NOT a property of the image formed by a convex lens when the object is at infinity?
(1) Real
(2) Inverted
(3) Highly diminished
(4) Erect
The center point of a lens is called the ________.
The distance between the optical center of a lens and its principal focus is called the ________.
The distance from the optical center of a lens to the principal focus is called the ________.
The image formed by a concave lens is always ________, ________, and ________.
A concave lens always forms a real image. True or false?
A real image formed by a lens can be obtained on a screen. True or false?
A virtual image can be formed by a convex lens. True or false?
The image formed by a convex lens can be both real and virtual. True or false?
