Using format’s principle establish the laws of refraction of light.
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Yor are sonal/samkit of vidyanjali public school, lucknow .you have seen an advertisement in 'the times of india ' related to new batches pf astronomy club intiated by national science centre lucknow starting from the coming fornight you wish to join the club. Write a letter to the director , enquring about the venue duration, fee - structure , activities transporation etc invent other neccessary details (100-120)
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