A question about power, and photons

[cupcuppycup]

Homework Statement

a handheld gaming device has 120 pixels per inch on its 2X3 in screen and uses a 5V, 7 watt*hour battery to power it. if each pixel is lit by a photon that is emitted from one electron flowing across the diode, will it last the whole week if you play it just in physics? (physics is 60 minutes each day for five days a week and assume a photon lasts 1 nanosecond)

Homework Equations

The Attempt at a Solution

 

[tiny-tim]

welcome to pf!

hi cupcuppycup! welcome to pf!

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