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Magnifying glass: Quiz


Question 1: The magnifying glass is an icon of detective fiction, particularly that of ________.
Arthur Conan DoyleSherlock HolmesProfessor MoriartyJohn Watson (Sherlock Holmes)

Question 2: Visually impaired people often benefit from magnifying glasses and similar ________ aids.
Low visionAstigmatism (eye)Central serous retinopathyBlindness

Question 3: The distance between the lens and the object must be shorter than the ________ of the lens for this to occur.
Digital photographyFocal lengthApertureHolography

Question 4: A typical magnifying glass might have a ________ of 25 cm, corresponding to an optical power of 4 dioptres.
HolographyDigital photographyFocal lengthAperture

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