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When a rectangular glass slab is kept on...

When a rectangular glass slab is kept on a few letter of different colours, the letter of violet colour appears to be raised more. What is the reason behind it?

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CHHAYA PUBLICATION-REFRACTION OF LIGHT-EXERCISE Short Answe Type Question - II
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  11. a red ray and a violet ray are incident simultaneously on a glass slab...

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  12. The sun subtends an angle of 180^(@) to our eyes form sunrise to sunse...

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  13. There is air above water. Total internal reflection may take place for...

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  14. Why does the crack of a glass window shine?

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  15. Why will not the total internal reflection take place if light travels...

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  16. Why is total internal reflection called total?

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