The rest mass of a photon of wavelength - is

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Standard XII

Physics

Threshold Frequency

The rest mass...

Question

The rest mass of a photon of wavelength $λ$ is

Zero

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\frac{h}{λ}

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\frac{λ}{h}

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\frac{h c}{λ}

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Solution

The correct option is B Zero
The correct general equation is $E^{2} = m^{2} c^{4} + p^{2} c^{2}$
m is the rest mass, the one you'd observe if you were in the same reference frame. A photon has no reference frame; it has zero rest mass.

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The rest mass of a photon of wavelength λ is

The correct option is B ZeroThe correct general equation is E2=m2c4+p2c2m is the rest mass, the one you'd observe if you were in the same reference frame. A photon has no reference frame; it has zero rest mass.

The rest mass of a photon of wavelength $λ$ is

The correct option is B Zero
The correct general equation is $E^{2} = m^{2} c^{4} + p^{2} c^{2}$
m is the rest mass, the one you'd observe if you were in the same reference frame. A photon has no reference frame; it has zero rest mass.