The wavelength of red light is given as 6.5 × 10^-7 m. If another wave of an unknown type has a frequency of 5.3 × 10^15 Hz. What is the relation between the wavelength of the unknown wave and red light? (note: c = 2.998 × 10^8 m/s)
Choices:
-The wavelength of the unknown wave is less than the wavelength of the red light
-The wavelength of the wave is greater than the wavelength of the red light
-The wavelength of the wave is equal to the wavelength of the red light
-The wavelength of the wave is not related to the wavelength of the red light

Question

The wavelength of red light is given as 6.5 × 10^-7 m. If another wave of an unknown type has a frequency of 5.3 × 10^15 Hz. What is the relation between the wavelength of the unknown wave and red light? (note: c = 2.998 × 10^8 m/s)
Choices:
-The wavelength of the unknown wave is less than the wavelength of the red light
-The wavelength of the wave is greater than the wavelength of the red light
-The wavelength of the wave is equal to the wavelength of the red light
-The wavelength of the wave is not related to the wavelength of the red light

aaronq · Answer

convert the frequency given to wavelength, then compare.

$$\nu = \frac{ c }{ \lambda } $$

anonymous · Answer

What does the symbol below c mean and symbolize?

aaronq · Answer

c is the speed of light, the one underneath is lambda and it symbolizes wavelength.
v (nu) is frequency

anonymous · Answer

So, do I plug in the formula for both 5.3 × 10^15 Hz and 6.5 × 10^-7 m?

aaronq · Answer

well, you're converting frequency to wavelength, right?

so your unknown IS wavelength.

anonymous · Answer

Ok. Got it right. Thanks.

aaronq · Answer

good stuff. no problem