The moon and Earth are examples of non-luminous objects. Non-luminous objects become visible only when they reflect light produced by a luminous object. A luminous object, such as the sun, emits its own light, because it has its own source of energy.Know More
According to Penn State University's Astrology Department, the Moon has a very dark surface that only reflects about 3 percent of the sun's light. The moon's cycle is determined by the amount of light that reflects from the moon's surface in relation to its position in orbit around Earth. When only half of its surface is lit, this is called the first or third moon quarter. As Earth and the moon orbit the sun, Earth regularly blocks the moon from the sun completely; this is called a new moon. A full moon is entirely illuminated by the sun's light.
Earthshine occurs when the Earth reflects sunlight onto the moon's surface when the moon is in its crescent phase. The crescent portion is brightly lit by reflected sunlight, while the rest of the moon dimly reflects light from the Earth. As this double-reflected light travels through space, it becomes even dimmer as some of it is absorbed into Earth’s atmosphere.Learn more about Optics & Waves
Some examples of transparent objects include glass, cellophane, diamond and amber. Transparency is caused when light passes through a material without being scattered. It has application in many fields and is used both for function and aesthetical purposes.Full Answer >
An echo is the reflection of sound waves off distant objects, whereas flutter echoes bounce repeatedly off multiple surfaces. An example of an echo is when someone shouts into a well, or along canyon walls, and the sound of the human voice comes back to the person's ears. A flutter echo occurs in large buildings with parallel walls, such as gymnasiums, where sounds increase to create loud environments.Full Answer >
A list of transparent objects contains names of objects through which light can pass completely. Such a list includes objects such as glass bottles, glass jars, pure water, clear plastic bottles, a petri dish, a concave lens, a convex lens and the pupil of the eye.Full Answer >
Most metallic objects, like aluminum foil, iron or zinc objects, anything with copper or iron oxide paint, steel pots, and iron skillets can block radio waves. However, depending on the frequency of different radio wavelengths, some wavelengths may be powerful enough to surpass certain metals.Full Answer >