Which of the following is/are the property/properties of a monochromatic electromagnetic wave propagating in the free space?
1. Electric and magnetic fields will have a phase difference 
.
2. The energy of the wave is distributed equally between electric and magnetic fields.
3. The pressure exerted by the wave is the product of its speed and energy density.
4. The speed of the wave is equal to the ratio of the magnetic field to the electric field.
Text Solution
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The energy of electromagnetic wave is equally divided between electric and magnetic field.
The equation consisting of frequency 
and 
The maximum frequency is 
.
Electric and magnetic field will have zero phase difference. The pressure exerted by electromagnetic wave is the ratio of energy density to the speed of light.
Hence, the correct option is .
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