"Wonderful Lens" Light and Eyes PPT Courseware 2

Description

"Wonderful Lens" Light and Eyes PPT Courseware 2

Convex lens: thick in the middle and thin at the edges B, D, E

Concave lens: thin in the middle and thick at the edge A, C, F

Lens classification

Convex lens: A lens with a thick middle and thin edges is called a convex lens.

Concave lens: A lens with a thin middle and thick edges is called a concave lens.

A convex lens can make light parallel to the main optical axis converge at a point, which is called the focus.

The distance from the focus to the optical center is called the focal length

The reverse extension lines of the divergent rays intersect at a point, this point is called the focus

The distance from the focus to the optical center is called the focal length

(1) Three special rays of convex lens

①: Light rays parallel to the main optical axis, refracted rays pass through the focus.

②: For light passing through the focus, the refracted light is parallel to the main optical axis.

③: The propagation direction of light passing through the optical center does not change.

(2).Three special rays of concave lens

①. For light rays parallel to the main optical axis, the reverse extension line of the refracted light ray passes through the (virtual) focus.

②. The extended line passes through the (virtual) focus of the ray, and the refracted ray is parallel to the main optical axis.

③. The direction of propagation of light passing through the optical center does not change.

discuss

Why can't you just throw the glass bottles with liquid left in the woods when you go on an outing?

Standard training

According to the direction of light passing through the lens in the picture, fill in the appropriate type of lens in the picture.

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For more information about the "Light and Eyes Wonderful Lenses" PPT courseware, please click the Light and Eyes ppt Wonderful Lenses ppt tag.

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Update Time: 2024-10-19

This template belongs to Physics courseware Guangdong and Shanghai version of eighth grade physics volume one industry PPT template

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