A luminous object is one that can create its own light, powered by an internal energy source. Luminous objects tend to generate heat due to the light they emit.Know More
Any object capable of sustaining its own energy source and light is called a self-luminous object. Stars are examples self-luminous objects, powered by nuclear fusion. This energy source allows them to emit light and radiate heat without relying on light reflections from other sources or external sources of energy.
Objects that are incapable of storing energy and emitting their own light are known as non-luminous objects. These objects become visible when they reflect light from luminous sources.Learn more about Optics & Waves
Wien’s law, also known as the displacement law, reveals the wavelength at which any object emits the majority of its energy. The formula used to calculate the wavelengths using Wien’s law is λmax (wavelength) equals 3 x 10^7 divided by temperature.Full Answer >
A spectroscope relies on separating light into its component parts because of the information that can be obtained from examining the wider spectrum of colors that composes white light as it is reflected off an object. Such information can include elemental composition as well as how much of a particular element makes up the object that is being looked at.Full Answer >
A common example of diffraction of light is looking at an object that is partially immersed in water, where the object appears to be in a different place. Sound diffraction is usually not visible, but it is audible through walls or other solid objects.Full Answer >
Stroboscopes appear to freeze an object in cyclical motion by flashing light repeatedly at the same point during the object's cycle. An example of this effect is flashing a stroboscopic light on a clock once per minute. In this case, the second hand appears still, though it has rotated fully.Full Answer >