## Excel in math and science

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### Learn more effectively through short, conceptual quizzes.

## Our wiki is made for math and science

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Master advanced concepts through explanations,

examples, and problems from the community.

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Easy Math Editor

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

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TopNewestHI,Abhisek, You can see parts of a real image without a screen, and only from a limited range of angles. The light rays from the lens have to reach your eye directly, and your area of view is limited by the aperture of the lens. You can see a complete image only by using a screen, which scatters the light so it is visible from a wide angle.

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Thanks for the clarification. It seems our textbook dooms us.

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