An x-ray tube emits x-rays with a wavelength of 1.00 x 10-11 m. calculate the photon energy, in joules, that the emitted x-rays possess. e = x 10 joules

the answer is a hope this

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i just did this and got a 100.

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length