In many images of light emitting objects we see such rays. Why do they appear ? is there some logic behind their number and direction? https://snn2fq.sn2.livefilestore.com/y1p0ATodhghPKL1hT_kOsbq9dr1hASHy687fCCOgSmWFpePO9Hekndzh2ixr2xiTwbHHpw6D179CJhJOp1y3tH1ovNyasQGS3h3/WP_000163.jpg
What are these rays appear in photograph of sun?
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