Light
Outside stimuli refers to the sensory information or signals that come from the external environment and are detected by our senses, leading to our conscious awareness of them.
Sensory perception is the process by which we interpret and give meaning to sensory information received from outside stimuli.
Sensory thresholds are the minimum levels of stimulation required for us to detect different types of sensory input.
Selective attention is our ability to focus on specific stimuli while filtering out irrelevant or unimportant information.