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Related Concept Videos

Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
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Subliminal Perception

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Related Experiment Video

Updated: Jun 22, 2026

Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY
10:28

Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY

Published on: June 30, 2016

On perfect cloaking.

David A B Miller

    Optics Express
    |June 17, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates a method for cloaking objects, rendering them invisible to classical waves using sensors and active sources. The technique is broadly applicable and simulated for scalar waves, though quantum probes may still detect cloaked regions.

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    Transient Optical Clearing Using Absorbing Molecules for Ex Vivo and In Vivo Imaging

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    Area of Science:

    • Physics
    • Wave Phenomena
    • Electromagnetism

    Background:

    • Classical invisibility cloaking remains a significant challenge.
    • Existing methods often have limitations in bandwidth or practicality.

    Purpose of the Study:

    • To present a theoretical framework for achieving classical cloaking.
    • To demonstrate the feasibility of broad-bandwidth cloaking using active control.

    Main Methods:

    • Utilizing sensors and active sources positioned around a target region.
    • Developing a general expression for calculating the required source parameters.
    • Performing explicit, fully causal simulations for scalar wave propagation.

    Main Results:

    • Successful theoretical demonstration of cloaking a region of space.
    • Simulations confirm the effectiveness of the proposed method for scalar waves.
    • Analysis of vulnerability to broad-band probing and quantum detection.

    Conclusions:

    • The proposed active cloaking method offers a principle for rendering objects classically invisible.
    • The approach is potentially operable over broad bandwidths.
    • Active cloaking schemes remain detectable by quantum probes irrespective of bandwidth.