# Slow motion

Which of the following is true about light in media?

• A - The speed of light in a medium isgiven by $v = c\lvert n\rvert.$
• B - The speed of light in a medium is given by $v = c/\lvert n\rvert.$
• C - The speed of light in a medium is given by $v=c.$
• D - The wavelength of light in a medium is given by $\lambda_\textrm{m} = \lambda_\textrm{air}\lvert n\rvert,$ where $\lambda_\textrm{air}$ is the wavelength of the light in air.