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Science Library Quiz

EMR

Instructions: answer the questions, check them carefully, and when you are sure they are all right, press submit. The number of correct answers will be displayed.

Question 1: How can a pinhole camera produce an image if it doesn't have a lens?




Question 2: A student wishes to photograph his 160cm-tall friend with a pinhole camera. He has a box 20cm across. How far away should the friend stand to produce a 15cm image?




Question 3: When is a pinhole camera image larger than the object being photogaphed?




Question 4: How could artists in the Middle Ages use pinhole cameras if they did not have photographic paper or film?




Question 5: What was the advantage to early life to have light sensitive organs?




Question 6: Why do humans and most animals have only two eyes, while spiders and other insects have many?




Question 7: If the pinhole camera image is real and inverted, and in focus, where is the focal point?





Question 8: What is meant by an 'evolutionary arms race'?




Question 9: What is the purpose of fluid in the eyeball?




Question 10: Why does the image in a pinhole camera come out negative?





Question 11: Which band of the EMR spectrum is used for remote control devices, such as for home media equipment?







Question 12: Which band of the EMR spectrum is used for examining broken bones in a hospital?







Question 13: Which band of the EMR spectrum is used to examine structures of crystals and other materials?







Question 14: Which band of the EMR spectrum is emitted by warm objects?







Question 15: Which band of the EMR spectrum is used to kill harmful bacteria in food so it stays fresher for longer?







Question 16: Which band of the EMR spectrum causes water molecules to vibrate very quickly causing heat, and your dinner is cooked in minutes?







Question 17: Which band of the EMR spectrum will give you a tan if you sit out in the Sun?







Question 18: Which band of the EMR spectrum is used the most in optical fibre communication?







Question 19: Which band of the EMR spectrum is used to read barcodes on products at supermarket cashiers?







Question 20: in addition to heat and ultraviolet, which band of the EMR spectrum can be used to sterilise medical equipment by killing bacteria?







Question 21: Which band of the EMR spectrum is used by police for night vision?







Question 22: In addition to high-frequency radio, which band of the EMR spectrum is used for satellite communication?







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