An optical illusion v/hich occurs mainly in deserts during hot summer is based on the principle of .

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Q: 2 (NDA-I/2017)
An optical illusion v/hich occurs mainly in deserts during hot summer is based on the principle of .

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,27,14,8,5,1,27

keywords: 

{'deserts': [4, 0, 1, 1], 'reflection': [1, 1, 2, 19], 'hot summer': [1, 0, 0, 2], 'total internal reflection': [0, 1, 2, 1], 'hich': [0, 0, 0, 1], 'dispersion': [0, 0, 1, 16]}