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dull

Primary Information
Secondary Information

Definition

Dull means not bright or interesting. This can apply to objects, people, or events.

For example, a dull object might be a grey rock or a cloudy day. A dull person might be someone who is not very talkative or who does not seem to be very interested in anything. A dull event might be a boring lecture or a movie that is not very exciting.

Dullness can be caused by a number of factors, including the lack of light, the lack of interest, or the lack of excitement.

How can the word be used?

The dull colours of the painting made it seem lifeless.

dull

Different forms of the word

Adjective: dull, duller, dullest.

Adverb: dully.

Noun: dullness.

Verb: dull, dulled, dulling.

Etymology

The word "dull" comes from the Old English word "dūl," which also meant "not sharp or bright." The word "dūl" is related to the Old Norse word "dūlr," which also meant "not sharp or bright.".

Question

What materials have a dull surface?

AQA Science Exam Question and Answer

Question:

Explain the concept of a "dull" object and the scientific principle behind its appearance. Describe how surface texture and light interaction play a role in determining whether an object appears dull or shiny. Provide examples of materials that typically exhibit a dull appearance and the practical applications of dull objects in everyday life.

Answer:

In the context of appearance, a "dull" object refers to an object that lacks a shiny or reflective surface. The scientific principle behind a dull appearance lies in the surface texture and light interaction. Dull objects have irregular or rough surfaces that scatter light in various directions, causing the reflected light to be diffused rather than focused. As a result, the object's surface appears non-reflective and dull.

Materials like cardboard, unpolished wood, and some fabrics often exhibit a dull appearance due to their rough surfaces. These objects are less likely to reflect light uniformly, which makes them ideal for reducing glare and providing a softer appearance in various applications. For example, dull paints are used in interior design to minimise reflections and create a cosy atmosphere. Understanding the interaction of light with different surfaces helps in selecting appropriate materials for various practical purposes and contributes to the aesthetics of our surroundings.