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Reflective Property of Parabolas01:26

Reflective Property of Parabolas

A parabola is a basic type of conic section that results from the intersection of a plane with a double-napped cone in a direction parallel to one of the cone's sides. This U-shaped curve has a distinctive reflective property: all incoming rays parallel to its axis of symmetry are directed toward a single point, known as the focus. This property is widely utilized in optical and communication technologies that require precise signal concentration.In analytic geometry, a parabola is defined as...
X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...

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Related Experiment Video

Updated: Jun 12, 2026

Fluorescence Imaging with One-nanometer Accuracy (FIONA)
11:56

Fluorescence Imaging with One-nanometer Accuracy (FIONA)

Published on: September 26, 2014

Conical foil x-ray mirrors: performance and projections.

P J Serlemitsos

    Applied Optics
    |June 10, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed conical grazing incidence mirrors to enhance astronomical observations in the iron K band. These lightweight, cost-effective mirrors offer improved sensitivity and resolution for X-ray telescopes.

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    Area of Science:

    • Astrophysics and Space Science
    • X-ray Astronomy Optics

    Background:

    • Developing advanced optics is crucial for enhancing the sensitivity and resolution of astronomical observations.
    • The iron K spectral band (around 7 keV) is a key region for studying high-energy astrophysical phenomena.

    Purpose of the Study:

    • To present the design, fabrication, and performance of conical grazing incidence mirrors developed at Goddard.
    • To improve astronomical observation capabilities in the iron K spectral band.
    • To address design and fabrication challenges for X-ray telescopes.

    Main Methods:

    • Utilizing tightly packed conical foils to balance imaging capability with lightweight, high throughput, and low cost.
    • Focusing on reflector substrate material, supports, reflector preparation, mirror assembly, and alignment techniques.
    • Testing and evaluating mirror performance for astronomical applications.

    Main Results:

    • Successful development of conical grazing incidence mirrors for X-ray astronomy.
    • Addressing critical design and fabrication issues for broad band X-ray telescopes.
    • Demonstrating the trade-offs between imaging capability and other crucial requirements like weight and cost.

    Conclusions:

    • Conical grazing incidence mirrors offer a viable solution for increasing sensitivity and resolution in the iron K band.
    • The developed mirrors are nearing completion for NASA's SHEAL II mission.
    • Future work will focus on improved spatial resolution and broader applications.