Visible light has frequencies from 4.3×1014 to 7.5×1014 Hz, whereas the frequency region for infrared radiation is 3.0×1011 to 3.0×1014 Hz

Question

1. The speed of visible light is higher than lower than the same as? infrared radiation.

2. The wavelength of visible light is longer than shorter than the same as ??infrared radiation.

Answer 1

The speed of light is a constant, and does not change with frequency or wavelength.

c = λf

with c being the speed of light, λ being the wavelength, and f being the frequency.

So, when frequency increases, wavelength decreases. If frequency decreases, the wavelength increases.

You can look at the frequency ranges and figure out if visible light has a higher or lower frequency than infrared light. Then figure out if the wavelength will be higher or lower.

Answer 2

Alexandria

v=fλ. For all electromagnetic radiation v is constant at about 3 x 10⁸ m/s.

So if f goes up, λ goes down. If f goes down, λ goes up.

If λ goes up, f goes down. If λ goes down, f goes up.

That's enough information for you to be able to solve these.

Mike