4. How much energy is in a 63-kHz photon of AM radiation (Hint: the Planck constant h = 6.626 × 10⁻³⁴ m²kg/s)?
(A) 1.0 × 10⁻³⁸ J
(B) 6.6 × 10⁻³⁰ J
(C) 4.2 × 10⁻²⁹ J
(D) 3.1 × 10⁻³⁰ J
(E) 13 × 10⁻²⁹ J

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