A sphercial miror and a thin sphercial lens have each a focal length of -15cm .the miror and the lense are likely to be.1. both concave,2. both convex ,3. the miror is concave and the lense is convex ,4. the miror is convex but the lense is convex.
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Answer is option 3. the miror is concave and the lense is convex.
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ਗੁਰੂ ਨਾਨਕ ਦੇਵ ਜੀ ਨੂੰ ਸੁਲਤਾਨਪੁਰ ਕਿਸ ਨੇ ਬੁਲਾਇਆ? *
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