Why do substances have different colours?

The part of an atom or molecule that “reflects” the light is the electrons on the outside of the atom. If the electrons give out exactly the same light as they absorb, the substance is “colorless”.. however if the color of the light emitted is different from the color absorbed, then the substance has a color.

Does light exist out of multiple colors?

Upon passage through the prism, the white light is separated into its component colors – red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.

Do objects have color in darkness?

In the dark, when no light is falling on the object then no color is emitted by it. Note : Any object that appears black is the one which absorbs all VIBGYOR wavelengths, so no color is emitted and we can see only black just like the objects that are kept in dark, no color is emitted.

What Colour is chemistry?

Chemistry/science is black.

Is the world colorless?

When these photons hit our retina, they are converted to electric signals and sent to the visual cortex at the back of our brain called V1. …

What characteristics enable us to distinguish one substance from another?

The characteristics that enable us to distinguish one substance from another are called properties. A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

How can a single substance impart different colors to urine?

.A single substance can impart different colors to urine depending on the 1. amount of the substance present. 2. storage conditions of the urine. 3. pH of the urine. 4. structural form of the substance A. 1, 2, and 3 are correct. B. 1 and 3 are correct. C. 4 is correct. D. All are correct.

Can a pure substance have a variable composition?

C) Pure substances cannot have a variable composition. A) must be an element. B) could be a compound. C) must be a pure substance. When substance A reacts with substance B, a new substance C is formed. Based on this A) both A and B are elements.

What is the difference between a compound and a solution?

–Solutions – a special kind of mixture where one substance dissolves in another. •Elements – simplest form of pure substance. They cannot be broken into anything else by physical or chemical means. •Compounds – pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemical means.