Compound eyes detect motion, and simple eyes detect light. or The compound eyes are used to "see". The simple eyes are used to detect light intensity.
Our eyes have severl million sensory cells which can detect the light waves coming from any object and on the basis of wavelength of that waves brain transmit the colour signal to the cells of eyes..
Tears are produced by the lacrimal glands in response to emotions, irritants, or to moisturize the eyes. When our eyes detect something irritating, a signal is sent to the brain which triggers the release of tears to help protect and lubricate the eyes.
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eyes
Your eyes can detect visible light, which is a form of electromagnetic radiation that falls within a specific range of wavelengths. This is why your eyes are sensitive to colors and brightness levels in the environment.
The minimum detectable signal in a radar system is the weakest signal that the system can detect reliably against background noise. It is determined by the receiver's sensitivity and the signal-to-noise ratio of the system. A lower minimum detectable signal indicates that the radar system can detect weaker signals.
used to detect the microwave signal
Everything except visible light (cosmic, X-rays, radio, infra-red, ultra-violet, etc.).
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