Exam: TOEFL

Definition: The movement of a living thing towards or away from light.

Example: Many plants exhibit phototaxis by growing towards the sunlight.

Definition: A type of treatment that uses light to help heal certain health problems, especially skin issues.

Example: The doctor recommended phototherapy to treat her skin condition.

Definition: Causing the skin to become more sensitive to light, especially sunlight, which can lead to damage like sunburn or blisters.

Example: Some medications can be phototoxic, making your skin more vulnerable to sunburn.

Definition: A harmful reaction that occurs when the skin or body is exposed to light, particularly sunlight, often resulting in skin damage or other negative effects.

Example: Some medications can cause phototoxicity, leading to severe sunburns even with minimal sun exposure.

Definition: A type of electronic component that can detect light and convert it into an electrical signal.

Example: The phototransistor is commonly used in light sensors and optical communication devices.

Definition: This word describes something that tends to move or grow in response to light, often used in relation to plants or organisms that react to light sources.

Example: Plants are phototropic, bending towards the sunlight to maximize their growth.

Definition: The way a plant or organism grows or moves in response to light, usually towards it.

Example: The sunflower exhibits phototropism by turning its head to follow the sun throughout the day.

Definition: Relating to the generation of electricity from light, especially sunlight, through the use of certain materials that produce voltage when exposed to radiant energy.

Example: The new building is equipped with photovoltaic panels to harness solar energy.

Definition: The technology that converts sunlight into electrical energy.

Example: Many homes are now using photovoltaics to generate their own electricity from the sun.

Definition: Relating to or consisting of a group of words that work together as a single unit in a sentence.

Example: In English, a phrasal verb combines a verb with a preposition or adverb to create a new meaning.