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Lenses
Question | Answer |
---|---|
If an image is outside the focus of a convex lens is it upright or inverted? | Inverted |
If an image is outside the focus of a convex lens is it enlarged or diminished? | Diminished |
If an image is inside the focus of a convex lens is it upright or inverted? | Upright |
If an image is inside the focus of a convex lens is it enlarged or diminished? | Enlarged |
At what distance does an object appear to be the same size as the image it creates in a convex lense | Twice the focal length |
At what distance does the image become virtual in a convex lens? | Less than the focal length |
What are the three properties of images formed by concave lenses? | Virtual, diminished and upright |
What is the unit of measurement for the power of a lens? | per meter (m^-1) |
Name the 9 parts of the eye | Iris. Ciliary muscle. Cornea. Aqueous humour. Vitreous humour. Crystalline lens. Retina. Optic nerve. Sclerotic. |
What part of the eye controls light entering the eye? | The Iris |
What parts of the eye focus light? | The cornea & crystalline lens work as a converging system. Aqueous humour & vitreous humour. |
What does the retina do? | It is a light sensitive screen that transmits signals to the brain. |
What do the ciliary muscles do? |