Exam: Cambridge English: C1 Advanced (CAE)

Definition: A small electronic device that converts light into electrical current, often used in sensors and optical applications.

Example: The photodiode is used in the camera to detect light and help capture images.

Definition: To break down a molecule into smaller parts using light energy.

Example: The chemical reaction will photodissociate the compound when exposed to ultraviolet light.

Definition: Relating to the use of light to enhance effects or induce reactions, particularly in medical treatments like destroying cancer cells with light-sensitive dyes.

Example: The photodynamic therapy used in her treatment helped to target the cancer cells effectively.

Definition: Relating to the electrical effects that occur when light interacts with certain materials.

Example: The photoelectric effect is a key principle in the operation of solar panels.

Definition: An electron that is emitted from a material when it absorbs light or other electromagnetic radiation.

Example: When light hits the surface of the metal, a photoelectron is released.

Definition: Relating to electronic devices or effects that are influenced by light.

Example: The photoelectronic sensor detects changes in light levels to adjust the camera settings automatically.

Definition: The process of releasing electrons from a material when it is exposed to light, particularly from metals.

Example: The experiment demonstrated the phenomenon of photoemission when the light hit the metal surface.

Definition: Relating to the process where light causes the emission of electrons from a material.

Example: The photoemissive properties of the material make it suitable for use in light sensors.

Definition: A method of creating images or designs on a surface by using photographic techniques to transfer the image onto a plate, which is then etched for printing.

Example: The artist used photoengraving to create detailed prints of her original artwork.

Definition: The process in which a substance's atoms or molecules become excited after absorbing light energy.

Example: Photoexcitation is essential in processes like photosynthesis, where plants convert light energy into chemical energy.