Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object.

Yes, light at specific wavelengths can cast a ‘shadow’ of an atom. Here’s the catch: the atoms need to be arranged in periodic patterns, like in a crystal structure. Examples are metals, ceramics and semiconductors. To cast a shadow by x-ray diffraction, the target must be illuminated by x-rays.

Shadows are formed because light travels in straight lines. Shadows are formed when an opaque object or material is placed in the path of rays of light. The opaque material does not let the light pass through it. The light rays that go past the edges of the material make an outline for the shadow.

Matter is usually defined as something that has mass and takes up space. So a shadow is not matter, since it has no mass and takes up no space. Instead, a shadow is a lack of light on a certain area.

Shadows. In principle, shadows can move faster than the speed of light. When a shadow is bigger than the object casting it, it moves at a greater distance but in the same amount of time. If the shadow is large enough, it could move across the surface faster than light.

Each light source casts a shadow, but other light sources are throwing shadows in different places. If you look where the shadows partially overlap, you can see lots of different colours, each caused by the absence of one colour and the admixing of others. In general, shadows DO have colours.

a shadow is caused by an object blocking light so that it does not reach a surface. The area in shadow appears black because there is no light falling on it—-it appears dark. In fact most shadows are not totally black because light usually bounces around the obstruction off other objects.

When a red light, a blue light, and a green light are all shining on the screen, the screen looks white because these three colored lights stimulate all three types of cones in your eyes approximately equally, creating the sensation of white.

It’s not the shadow that has colour, it’s the light not being blocked that does. Saying a shadow has colour is like saying a vacuum has density. A shadow is a dark area where light intensity is blocked by an opaque object between the light source and the viewer.

In real life, shadows often appear to be a different color than the area around them. The shadows appear blue because the bright yellow light from the sun is blocked from the shadow area, leaving only indirect light and blue light from other parts of the sky. …

However, not all the lights are blocked at each point on the wall. For example, when only the blue light is blocked by the object, the red and green light still reach the wall behind the object. But because your eye perceives red and green light at the same place to be yellow, you see a yellow shadow.

Note: When light is obstructed by an opaque object then shadow is formed while the image is the reflection of light rays by any object….Write a few differences between a shadow and an image.

Image	Shadow
3. Image contains colour, structure etc. of the object.	Shadow does not give any information about the object as it is colourless.

(Entry 1 of 3) 1 : the dark figure cast upon a surface by a body intercepting the rays from a source of light. 2 : partial darkness or obscurity within a part of space from which rays from a source of light are cut off by an interposed opaque body. 3 : a small degree or portion : trace.

A shadow is a dark (real image) area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light.

Simply speaking, a shadow is an absence of light. If light cannot get through an object, the surface on the other side of that object (for example, the ground or a wall) will have less light reaching it. A shadow is not a reflection, even though it is often the same shape as the object.

A shadow is light blocked by an object. The object can block all or part of the light. Shadows change size based on how close they are to the light source.

The definition of a shadow is a reflection of something produced by light hitting the object or someone who follows another person around. An example of shadow is when you see your silhouette on the ground when you go outside on a sunny day.

Yes, We can bend light if we can provide light with a faster path than straight line which is impossible in same type of material because straight line is always the fastest path. But when light passes through a denser medium, It slow down. So a bent path from denser object is faster for light.

There are 7 basic properties of light :

• Reflection of light.
• Refraction of light.
• Diffraction of light.
• Interference of light.
• Polarization of light.
• Dispersion of light.
• Scattering of light.

The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3).

White

Reflection is divided into three types: diffuse, specular, and glossy.

Waves. Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. The wavelength decreases as the light enters the medium and the light wave changes direction.

When the refraction of light occurs, the incident light rays bend. If the incident light ray is incident at 900 degrees, this means that it is parallel to the normal and it cannot bend away or towards it. If the light ray doesn’t bend then refraction doesn’t occur.

: the angle between a refracted ray and the normal drawn at the point of incidence to the interface at which refraction occurs.

Snell’s law, in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index of each. This law was discovered in 1621 by the Dutch astronomer and mathematician Willebrord Snell (also called Snellius).

Snell’s law (also known as Snell–Descartes law and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.

Most people are familiar with Snell’s Law because of the apparent shortening of their legs that is observed when standing in water. Snell’s Law states that the ratio of the sine of the angles of incidence and transmission is equal to the ratio of the refractive index of the materials at the interface.

the law that, for a ray incident on the interface of two media, the sine of the angle of incidence times the index of refraction of the first medium is equal to the sine of the angle of refraction times the index of refraction of the second medium.