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Chapter – 14 (Lenses & Microscopes)
Q.1: Define the following:
i) Concave lens.
ii) Convex lens.
Q.2: Fill in the blanks:
i) All convex lenses can focus ______________ up to a point.
ii) _________ are used to project pictures on a screen.
iii) Lenses are generally ________pieces of glasses.
iv) _________ is the study of disease.
Q.3: Mention the uses of:
i) Magnifying glass
Q. 4 : How do cells of blood and onion skin look under a microscope? Draw a diagram to show each.
Q. 5 : Identify the following lenses:
Q.6: Draw and name the two instruments that have lenses.
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