Why can we not see colours at night?
Jul 12, 2021
Human eyes cannot perceive colours at night because cones, responsible for colour perception, are only activated under intense light conditions.
Etiqueta: light
Fluorescence
Mar 08, 2021
The number of species catalogued as fluorescent increases each day, and UV lights can help us to find some that are only active during the night, generating a wide range of creative resources to photograph them.
Decoding smells
Mar 06, 2020
Using an external flash placed above the snake, accompanied by a high shutter speed, allowed me to freeze one of those chemosensory licks that the snake used to try to decipher its surroundings.
Why do wet materials become darker?
Jun 25, 2018
When a material gets wet, we see it with a darker colour. Professor Inmaculada Pascual Villalobos explains why.
Why is the sea blue?
May 14, 2018
When a large quantity of water is observed, as happens in the sea, we notice a blue color that can vary depending on the mass of water we are observing. Professor Inmaculada Pascual Villalobos explains why.
What is the function of the white of the eye?
Jan 31, 2018
The sclera, known for its color as «the white part of the eye», is an opaque, resistant, and fibrous membrane that covers part of the eyeball, giving it shape and protecting its interior.
Why do mirages occur?
Jan 19, 2018
We call a mirage seeing objects where they are not. It is an optical illusion that can be seen on very hot days and in places like deserts. Inmaculada Pascual Villalobos explains this and tells us about the «Fata Morgana» effect.
The extragalactic gamma-ray sky
Mar 24, 2017
The gamma-ray radiation represents the most energetic «light» of the electromagnetic spectrum.
Life from light, light for life
Jul 22, 2015
Light can be considered from many points of view. Light is essential for the development of life on Earth, has determined animal and plant evolution, and has also a role in many aspects of culture and art.
Faster than Light
Jul 18, 2012
ESA/Hubble & NASA Travelling at hyperluminal speeds would open to humanity the possibility of exploring the whole galaxy, and even, perhaps, other galaxies. In the image, the UGC 12158, photographed by the Hubble space telescope. It is believed to be a virtual twin of our own