Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash

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Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash

Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash. In one such unit, the flash lasts for a time interval of 1.48x10^-3 s with an average light power output of 3.40x10⁵ W

Part A

If the conversion of electrical energy to light has an efficiency of 97.0 % (the rest of the energy goes to thermal energy). how much energy must be stored in the capacitor for one flash?

Part B

The capacitor has a potential difference between its plates of 130 V when the stored energy equals the value calculated in part A. What is the capacitance?

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Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash

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