retroreflector

noun 0.744

radar

noun 0.720

parabolic reflector

noun 0.719

reflector

noun 0.698

radarscope

noun 0.678

passive radar

noun 0.634

radome

noun 0.619

radio beacon

noun 0.613

parabolic mirror

noun 0.609

reflecting telescope

noun 0.586

radio telescope

noun 0.582

refractor

noun 0.582

reflectivity

noun 0.563

reflectometry

noun 0.556

reflection

noun 0.552

horn antenna

noun 0.546

reflectometer

noun 0.543

backscattering

noun 0.542

reflecting

noun 0.542

deflector

noun 0.539

backscatter

noun 0.538

radio alarm

noun 0.538

radiometer

noun 0.534

reflection nebula

noun 0.532

radio astronomer

noun 0.530

echo sounder

noun 0.527

transponder

noun 0.527

rad

noun 0.523

ray gun

noun 0.522

radiator

noun 0.517

death ray

noun 0.516

rangefinder

noun 0.516

plane mirror

noun 0.515

antenna

noun 0.513

rear-view mirror

noun 0.513

spherical mirror

noun 0.510

mirror

noun 0.509

radio burst

noun 0.508

radio modem

noun 0.507

refracting telescope

noun 0.504

scatterometer

noun 0.504

ray

noun 0.503

radioelement

noun 0.503

radion

noun 0.502

metal detector

noun 0.502