While making a kaleidoscope, a transparent plastic sheet is pasted under the cardboard disc in order to:
A
give it an attractive look
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B
make the disc durable
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C
hold some air inside
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D
make patterns more colourful
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Solution
The correct option is B make the disc durable In a kaleidoscope, for making the disc durable, a piece of transparent plastic sheet is pasted under the cardboard disc.