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Bucketloads of Electrons!

Many electrons

Voltage: High

Implication: Many photons detected, bright exposure

Result: bright image

Few electrons

Voltage: Low

Implication: Few photons detected, dark exposure

Result: dark image

Max electrons

Voltage: Max

Implication: Max photons detected, brightest exposure

Result: White image

No electrons

Voltage: Zero

Implication: No photons detected, darkest exposure

Result: Black image

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