All of the above
Generally, white poster board reflects most visible lights. However, it may not reflect all lights equally. Some colors or wavelengths of light may be absorbed or scattered more than others, resulting in a slight variation in reflection.
One observation is that visible light can easily pass through small openings, like the gaps between leaves or the gaps between two fingers. If visible light had a wavelength much larger than a centimeter, it would not be able to pass through these small openings. Additionally, visible light can be easily diffracted by a small obstacle, like a hair or a thin wire. This diffraction behavior indicates that visible light has a much smaller wavelength than a centimeter.
No, limes do not light up lights on their own. However, limes can reflect or scatter light if a light source is shined on them. This can make them appear to be lit up when in fact they are just reflecting the light.
Humans are allowed to see a small portion of the electromagnetic spectrum known as visible light. This spectrum ranges from around 400 to 700 nanometers in wavelength and includes colors like red, orange, yellow, green, blue, indigo, and violet. Other waves in the electromagnetic spectrum such as infrared, ultraviolet, X-rays, and gamma rays are not visible to the human eye.
Sensors that primarily operate in the electromagnetic spectrum just below the range of visible light include infrared (IR) sensors. These sensors detect and measure infrared radiation, which has longer wavelengths than visible light. They are commonly used in applications such as night vision devices, remote temperature sensing, and proximity detection.
Ultraviolet (UV) radiation has more energy than visible light waves.
Light is an electromagnetic radiation. Our eyes are sensitive, the E/M radiation at the light wavelength. Hence we see light.
The E/M radiation adjacent to light are Infra-red(IR) and Ultra-violet(UV), which we do not see.
Radio and microwaves are longer than visible light. So are heat (infrared) waves.
Ultraviolet waves are shorter than visible light. So are X-rays and gamma rays.
In order to "see" something with eyes, the object must be longer than the light wave refracted from it. Molecules are too small to be refracted.
We know that ultraviolet light, X-rays and gamma rays have wavelengths shorter than visible light.
it appears black
All travel at the same speed through a vacuum