Simply put, reflectance is defined as a "measure of the ability of a surface to reflect light or other electromagnetic radiation".
While the polariser hasn't changed the amount of light leaving the surface of the an object, in this case bracken on the hillside, it has remained the same - but the polariser has prevented some of that light from reaching the lens and sensor.
In this case, the striking green landscape of Ireland's Wicklow Mountains, we can easily see the difference between the polarised and non-polarised image.
On those rainy, cloudy days where the sun really doesn't make an appearance the light is still great for photography.
Join me, Panoramic Ireland, to learn how to photograph and to see Ireland. Tours and workshops available all year round.
It was a fine evening, alone in the countryside with only birds and the sound of the wind to disturb the silence.
Although we are close to midsummer, there are still plenty of fine summer evenings like these to photograph in Ireland for 2022.
Join me to photograph in places like this or in urban Dublin, Belfast, Cork.
For availability check out the booking pages on the site or send me an email with your dates, places and interests.
An hour or so of changing conditions and changing my viewpoint up and down this short stretch of coastline allowed me to photograph a specific image. then to bed and ready for the next morning.
Each year the fulmar will return to the same ledge on the same cliff and will often mate for life. It lives for over 40 years and is a pelagic feeder of any type of fish.
The upper feathers are grey with brown feathers often visible, though most guides fail to mention these they are very evident in the image above. Undersides are white and the fulmar has a distinctive blue portion of the nose.
The fulmar is one of Ireland's fascinating seabirds, fantastic when seen in flight.
Of course, in Ireland seasons are not fixed and there is quite an overlap between winter and spring, we can still see snow and hailstones in April and heatwaves in February and March - one of which is predicted for the coming week.