A wave has a wavelength of 2.7 × 10−7 m and
a speed of 8×107 m/s in a particular material.
What is its frequency in this material? and Find the wavelength of this wave in vacuum

Question

A wave has a wavelength of 2.7 × 10−7 m and
a speed of 8×107 m/s in a particular material.
What is its frequency in this material? and Find the wavelength of this wave in vacuum

irishboy123 · Answer

you can solve the first bit of this knowing that 
$$v = f • \lambda$$

anonymous · Answer

i got 3.375*10 -15 or it could just be 3.375 but it said it was wrong

anonymous · Answer

it wouldn't be to the -15 power, should be a positive exponent

irishboy123 · Answer

$$8 (10^{7}) = f • 2.7  (10^{-7}) $$