Question

what is 1 dB? explain ​

Answer 1

Answer:

1 D is the power of lens.

Explanation:

1 D is here D means dioptre.

1 D can be useful to measure the power and doctor are using while advising about spectacles

Answer 2

Explanation:

Decibel (dB) unit for expressing the ratio between two physical quantities, usually amounts of acoustic or electric power and also for measuring the relative loudness of sound.

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