Grade 12 Physics: Lenses Worksheet
This worksheet covers fundamental concepts of lenses, including types of lenses, ray tracing, image formation, and the lens maker's formula, suitable for Grade 12 physics students.
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Grade 12 Physics: Lenses Worksheet
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Read each question carefully and provide your best answer. Show all your work for calculation problems.
1. Which type of lens causes parallel rays of light to converge at a single focal point?
Concave lens
Convex lens
Plano-concave lens
Diverging lens
2. When an object is placed at the focal point of a convex lens, the image formed is:
Real and inverted
Virtual and erect
At infinity
Diminished
1. A concave lens always forms a real image.
True
False
2. The power of a lens is measured in diopters.
True
False
1. The focal length of a convex lens is considered .
2. A virtual image formed by a lens is always .
1. Draw a ray diagram for an object placed beyond 2F of a convex lens. Describe the nature and position of the image formed.
2. A concave lens has a focal length of -15 cm. If an object is placed 10 cm from the lens, calculate the image distance and magnification. State the nature of the image.
Match the term with its definition.
1. Optical Center
a. The point where parallel rays converge or appear to diverge from.
2. Focal Length
b. The distance between the optical center and the focal point.
3. Principal Axis
c. A straight line passing through the optical center and perpendicular to the lens surfaces.
4. Focal Point
d. The central point of the lens through which light rays pass undeviated.
Use the words below to complete the sentences.
1. A convex lens is also known as a lens.
2. An image that can be projected onto a screen is a image.
3. A concave lens is a lens.