Question

17) 2 ਮੀਟਰ ਫੋਕਸ ਦੂਰੀ ਵਾਲੇ ਕਿਸੇ ਅਵਤਲ ਲੈੱਨਜ਼ ਦੀ ਸ਼ਕਤੀ ਗਿਆਤ ਕਰੋ? Find the power of a concave lens of focal length 2 m? 2 मीटर फोकस दूरी वाले किसी अवतल लेंस की क्षमता ज्ञात कीजिए? *
1) -0.25 D
2) -1.5 D
3) -0.5 D
4) -0.75 D
pls help me Frnds​

Answer 1

Answer:

The power of a lens is defined as the reciprocal of its focal length in metres, or P=f1, where P is the power in dioptres and f is the focal length in metres......

Explanation:

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Answer 2

Answer:

2) -1.5 D is correct answer.