Ans: Blue moon is a rare phenomenon in which two full moon appear in the same calendar month. The second full moon is termed as blue moon
Ans: When full moon is at the closet point of its orbit to the earth called perigee. Moon appear 30% brighter and 14% bigger than the apogee full moon.
Total internal reflection
Ans: TIR refers to the complete reflection of the ray of light in the same medium from the surrounding surface. This take place when angle of incidence is greater than the critical angle.BPCS Notes brings Prelims and Mains programs for BPCS Prelims and BPCS Mains Exam preparation. Various Programs initiated by BPCS Notes are as follows:-
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