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\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.
Power is measured in watts (W), energy in joules (J) and time in seconds (s). 1 W = 1 J/s (1 watt is 1 joule per second.) Electrical power can be calculated using the equation.
CBSE Class 11 Physics Thermal Properties of Matter Formulas: Find here a list of important formulas, definitions, graphs, and diagrams for CBSE Class 11 Physics Chapter 10, Thermal Properties of ...
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