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After a bruising Senate hearing over drone security issues last week, Chinese drone maker DJI told U.S. lawmakers that some claims made by witnesses were “inaccurate” and “unsubstantiated.” The company sent a letter on June 24 to the leadership of the Transportation Subcommittee of the Senate Commerce Committee in the aftermath of a hearing on
Researchers and engineers have long sought ways to conceal objects by manipulating how light interacts with them. A new study offers the first demonstration of invisibility cloaking based on the manipulation of the frequency (color) of light waves as they pass through an object, a fundamentally new approach that overcomes critical shortcomings of existing cloaking
Researchers and engineers have long sought ways to conceal objects by manipulating how light interacts with them. A new study offers the first demonstration of invisibility cloaking based on the manipulation of the frequency (color) of light waves as they pass through an object, a fundamentally new approach that overcomes critical shortcomings of existing cloaking