📚 Topic Summary
Diverging lenses, also known as concave lenses, are thinner in the middle and thicker at the edges. When parallel rays of light pass through a diverging lens, they spread out, or diverge, as if originating from a single point called the focal point. The images formed by diverging lenses are always virtual, upright, and smaller than the object. This makes them useful in applications like peepholes and some optical instruments.
🗂️ Part A: Vocabulary
Match the following terms with their definitions:
- Term: Focal Point
- Term: Diverging Lens
- Term: Virtual Image
- Term: Upright Image
- Term: Refraction
- Definition: An image formed by diverging rays that appear to come from a point behind the lens.
- Definition: The bending of light as it passes from one medium to another.
- Definition: A lens that causes parallel light rays to spread out.
- Definition: The point where light rays appear to originate from after passing through a diverging lens.
- Definition: An image that is oriented in the same direction as the object.
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✍️ Part B: Fill in the Blanks
Complete the following paragraph with the correct words:
A _______ lens is thinner in the middle than at the edges. When light passes through it, the rays _______. The image formed is always _______, _______, and _______. The distance from the lens to the focal point is called the _______.
🤔 Part C: Critical Thinking
Explain how the characteristics of an image formed by a diverging lens (virtual, upright, smaller) make it suitable for use in a peephole.