No, the elements are not always transparent.
<u>Explanation:</u>
The elements become transparent when the light passes through those elements. Transparency is caused because of the transmission and the passing of the light waves through these elements.
But the metals do not become transparent even when the light waves pass through these metals. Metals do not become transparent because the refractive index in them is very big.
<h2>Frequency</h2>
Explanation:
Wave frequency is the number of waves that pass a fixed point in a given amount of time.
Wave speed is the speed at which a wave travels.
Let the wave speed be ![v](https://tex.z-dn.net/?f=v)
Let the wave frequency be ![f](https://tex.z-dn.net/?f=f)
Let the wave length be ![l](https://tex.z-dn.net/?f=l)
The wave speed,frequency and wave length are related by the equation
.
When
increases,
increases on the other side to maintain equality when no other property is changing.
The percentage of CO2 increased 48 percent. Hope this helped!