A region of vacuum contains both a uniform electric field with magnitude E and a uniform magnetic field with magnitude B. (a) What is the ratio E/B if the energy density for the magnetic field equals the energy density for the electric field? (b) If E = 500 V/m, what is B, in teslas, if the magnetic-field and electric-field energy densities are equal?

A region of vacuum contains both a uniform electric field with magnitude E and a uniform magnetic field with magnitude B. (a) What is the ratio E/B if the energy density for the magnetic field equals the energy density for the electric field? (b) If E = 500 V/m, what is B, in teslas, if the magnetic-field and electric-field energy densities are equal?

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Question

A region of vacuum contains both a uniform electric field with magnitude E and a uniform magnetic field with magnitude B.

(a) What is the ratio E/B if the energy density for the magnetic field equals the energy density for the electric field?

(b) If E = 500 V/m, what is B, in teslas, if the magnetic-field and electric-field energy densities are equal?

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