Question

The correct option, if speed of gamma rays, $x-$ rays and micro waves are ${{\upsilon }_{g}},{{\upsilon }_{x}}$ $\And \,{{\upsilon }_{m}}$ respectively will be:

• A. ${{\upsilon }_{g}}>{{\upsilon }_{x}}=\,{{\upsilon }_{m}}$
• B. ${{\upsilon }_{g}}<{{\upsilon }_{x}}<\,{{\upsilon }_{m}}$
• C. ${{\upsilon }_{g}}>{{\upsilon }_{x}}>\,{{\upsilon }_{m}}$
• D. ${{\upsilon }_{g}}={{\upsilon }_{x}}=\,{{\upsilon }_{m}}$

Answer 1

Answer: (D)

${{\upsilon }_{g}}={{\upsilon }_{x}}=\,{{\upsilon }_{m}}$

Answer 2

These are electromagnetic waves. We know that electromagnetic waves moves with speed of light.