Respuesta :
Its wavelength and period are halved and the speed is unchanged.
Answer:
Wavelength becomes halved.
Explanation:
The velocity of electromagnetic wave is given by
v = f x λ
where, v is the speed of electromagnetic wave which is always equal to the speed of light.
f is the frequency and λ is the wavelength.
if the frequency is doubled, wavelength should be halved to keep the velocity constant.