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Free gk questions Online Test - MeritNotes
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No. of Questions :10
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1. What are the uses of lenses?
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2. What is an optical fibre?
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3. What is lens?
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4. Name the colours in the spectrum?
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5. What are primary colours?
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6. What is totally reflecting prism?
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7. What are secondary colours?
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8. What is the least distance of distinct vision?
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9. What is a spectrum?
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10. What is refraction?
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