Difference Wiki

Concave vs. Convex: What's the Difference?

Edited by Huma Saeed || By Sawaira Riaz || Published on January 7, 2024
Concave refers to a surface curving inward, like the inside of a bowl, while convex means a surface curving outward, like the exterior of a sphere.

Key Differences

Concave surfaces curve inward, resembling a cave, and are used in optical devices like telescopes to focus light. Convex surfaces, curving outward, are found in lenses like magnifying glasses to disperse light.
Sawaira Riaz
Jan 07, 2024
A concave shape has an inward curve, making it appear as if a segment is removed, like a crescent moon. In contrast, convex shapes bulge outward, resembling a dome or the surface of a balloon.
Sawaira Riaz
Jan 07, 2024
Concave mirrors concentrate light and produce magnified images, used in makeup mirrors for detailed view. Convex mirrors, curving outward, provide a wider field of view and are used in vehicles for rear-view perspective.
Huma Saeed
Jan 07, 2024
In mathematics, a concave curve dips inward, like a valley in a graph, representing a specific set of data points. A convex curve, on the other hand, swells outward like a hill, representing a different data distribution.
Aimie Carlson
Jan 07, 2024
In physics, concave surfaces reflect light inward, focusing beams to a point, essential in devices like satellite dishes. Convex surfaces scatter light, spreading beams outward, used in streetlight reflectors for broad illumination.
Harlon Moss
Jan 07, 2024
ADVERTISEMENT

Comparison Chart

Curvature

Inward curving
Outward curving
Sawaira Riaz
Jan 07, 2024

Mirror Type

Reflects and magnifies (e.g., shaving mirrors)
Disperses and shrinks (e.g., security mirrors)
Huma Saeed
Jan 07, 2024

Lens Effect

Converges light rays (e.g., telescope lenses)
Diverges light rays (e.g., peephole lenses)
Sawaira Riaz
Jan 07, 2024

Surface Appearance

Appears like a cave or a hollow
Appears like a bulge or a protrusion
Janet White
Jan 07, 2024

Geometry

Curves inward, resembling a cave or bowl
Bulges outward, resembling a dome or hill
Sawaira Riaz
Jan 07, 2024
ADVERTISEMENT

Concave and Convex Definitions

Concave

Concave refers to a surface or shape curving inward.
The concave design of the dish antenna helps to focus signals at a central point.
Sawaira Riaz
Dec 12, 2023

Convex

Convex refers to a surface or shape curving outward.
The convex lens in her microscope magnified the cells.
Huma Saeed
Dec 12, 2023

Concave

Concave mirrors converge light to a focal point.
The dentist used a concave mirror to inspect the patient's teeth more closely.
Janet White
Dec 12, 2023

Convex

Convex structures have an outward curvature.
The convex hull of the boat helped it glide smoothly over the waves.
Sawaira Riaz
Dec 12, 2023

Concave

Concave shapes resemble a hollow or a void.
The concave valley between the hills formed a natural amphitheater.
Harlon Moss
Dec 12, 2023

Convex

Convex shapes resemble a bulge or protrusion.
The convex surface of the bubble reflected the sunlight beautifully.
Janet White
Dec 12, 2023

Concave

A concave lens disperses light rays, causing them to diverge.
The concave lens in his glasses made his eyes appear smaller.
Janet White
Dec 12, 2023

Convex

A convex mirror spreads light, allowing for a wider view.
The store installed a convex mirror for better aisle surveillance.
Harlon Moss
Dec 12, 2023

Concave

Concave structures have an inward curvature.
The concave ceiling of the cave created an echo.
Sawaira Riaz
Dec 12, 2023

Convex

Convex lenses are used to converge light rays for magnification.
His reading glasses had convex lenses to aid his vision.
Janet White
Dec 12, 2023

Concave

Curved like the inner surface of a sphere.
Sawaira Riaz
Dec 11, 2023

Convex

Having a surface or boundary that curves or bulges outward, as the exterior of a sphere.
Sawaira Riaz
Dec 11, 2023

Concave

A concave surface, structure, or line.
Sawaira Riaz
Dec 11, 2023

Convex

Curved or bowed outward like the outside of a bowl, circle, or sphere.
Sawaira Riaz
Dec 11, 2023

FAQs

Do convex lenses make images appear larger or smaller?

Convex lenses generally make images appear larger.
Sawaira Riaz
Jan 07, 2024

Are concave shapes common in nature?

Yes, concave shapes like valleys or cave entrances are common in nature.
Sawaira Riaz
Jan 07, 2024

Can convex shapes be found in architecture?

Yes, convex shapes like domes are common in architecture.
Harlon Moss
Jan 07, 2024

Is a concave mirror good for detailed viewing?

Yes, concave mirrors magnify and are good for detailed viewing.
Sawaira Riaz
Jan 07, 2024

What are convex lenses used for?

Convex lenses are used to converge light rays for magnification.
Huma Saeed
Jan 07, 2024

Are convex surfaces used in vehicle mirrors?

Yes, convex mirrors are used in vehicles for a wider rear view.
Janet White
Jan 07, 2024

Can both concave and convex be used in mirrors?

Yes, concave mirrors focus light, while convex mirrors spread it for a wider view.
Sawaira Riaz
Jan 07, 2024

Are concave mirrors used in telescopes?

Yes, concave mirrors are often used in telescopes to focus light.
Janet White
Jan 07, 2024

What is a concave surface?

A concave surface curves inward, like the inside of a bowl.
Sawaira Riaz
Jan 07, 2024

Is the exterior of a sphere considered convex?

Yes, the exterior of a sphere is a typical example of a convex shape.
Sawaira Riaz
Jan 07, 2024

Is a convex surface ideal for a security mirror?

Yes, the wide view of a convex mirror is ideal for security purposes.
Aimie Carlson
Jan 07, 2024

Can concave lenses be used in eyeglasses?

Yes, concave lenses are used in eyeglasses for specific vision corrections.
Sawaira Riaz
Jan 07, 2024

How do concave lenses affect light rays?

Concave lenses cause light rays to diverge or spread out.
Janet White
Jan 07, 2024

What's the visual effect of a convex mirror?

Convex mirrors create a smaller, wider field of view.
Harlon Moss
Jan 07, 2024

Do concave surfaces have a magnifying effect?

Yes, concave surfaces like mirrors can magnify images.
Aimie Carlson
Jan 07, 2024

Are convex shapes more common in man-made objects?

Convex shapes are prevalent in both man-made and natural objects.
Janet White
Jan 07, 2024

Can concave structures concentrate sound?

Yes, concave structures can focus and amplify sound.
Janet White
Jan 07, 2024

Are convex mirrors used in public spaces?

Yes, convex mirrors are used in public spaces for safety and surveillance.
Sawaira Riaz
Jan 07, 2024

Do concave mirrors have a wide field of view?

No, concave mirrors focus light, limiting their field of view compared to convex mirrors.
Janet White
Jan 07, 2024

Do concave lenses have a spreading effect on light?

Yes, concave lenses spread light rays, causing them to diverge.
Aimie Carlson
Jan 07, 2024
About Author
Written by
Sawaira Riaz
Sawaira is a dedicated content editor at difference.wiki, where she meticulously refines articles to ensure clarity and accuracy. With a keen eye for detail, she upholds the site's commitment to delivering insightful and precise content.
Edited by
Huma Saeed
Huma is a renowned researcher acclaimed for her innovative work in Difference Wiki. Her dedication has led to key breakthroughs, establishing her prominence in academia. Her contributions continually inspire and guide her field.

Trending Comparisons

Popular Comparisons

New Comparisons