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  2. Ripple tank - Wikipedia

    en.wikipedia.org/wiki/Ripple_tank

    If a concave parabolic obstacle is used, a plane wave pulse will converge on a point after reflection. This point is the focal point of the mirror. Circular waves can be produced by dropping a single drop of water into the ripple tank. If this is done at the focal point of the "mirror" plane waves will be reflected back.

  3. 12 Deeply Calming Water Features That Are Easy to Incorporate ...

    www.aol.com/12-deeply-calming-water-features...

    These water feature ideas range from big-picture projects to the simplest backyard additions, so spaces of all sizes can find one that works best. ... Since the focal point of a bubbling water ...

  4. Water feature - Wikipedia

    en.wikipedia.org/wiki/Water_feature

    Water feature stone waterfall. Cascading water over natural rock to form a natural hillside water feature. A small pondless water feature in Jacksonville, Oregon, United States. The water reservoir and pump are located beneath some rock out of sight Artificial waterfall in the park of Bagatelle, France. Computerized musical water feature in ...

  5. Cardinal point (optics) - Wikipedia

    en.wikipedia.org/wiki/Cardinal_point_(optics)

    A system is focal if an object ray parallel to the axis is conjugate to an image ray that intersects the optical axis. The intersection of the image ray with the optical axis is the focal point F ′ in image space. Focal systems also have an axial object point F such that any ray through F is conjugate to an image ray parallel to the optical axis.

  6. Virtual image - Wikipedia

    en.wikipedia.org/wiki/Virtual_image

    A converging lens (one that is thicker in the middle than at the edges) or a convex mirror is also capable of producing a virtual image if the object is within the focal length. Such an image will be magnified. In contrast, an object placed in front of a converging lens or concave mirror at a position beyond the focal length produces a real image.

  7. Point bar - Wikipedia

    en.wikipedia.org/wiki/Point_bar

    The point bar typically has a gently sloping floor with shallow water. The shallow water is mostly the accumulated boundary layer and does not have a fast speed. However, in the deepest parts of the stream where the stream is flowing freely, vortex flow prevails and the stream is flowing fastest where the radius of the bend is smallest, and ...

  8. Parabolic trough - Wikipedia

    en.wikipedia.org/wiki/Parabolic_trough

    The hot fluid can be piped to a heat engine (e.g. ORC or water/steam Rankine cycle), which uses the heat energy to drive machinery, or to generate electricity. This solar energy collector is the most common and best known type of parabolic trough.

  9. 16 Stylish Range Hood Ideas That Will Be the Star of ... - AOL

    www.aol.com/16-stylish-range-hood-ideas...

    "They've become a focal point in kitchen design," says Victoria Armour, creative partner at interior design firm Stil James. "They're now as much about form as they are about function."

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