photomultiplier tube

noun 0.937

phototube

noun 0.717

photometer

noun 0.690

phototransistor

noun 0.690

photodetector

noun 0.688

photodiode

noun 0.688

photosensor

noun 0.633

photocathode

noun 0.624

photoelectric cell

noun 0.609

photoresistor

noun 0.607

photovoltage

noun 0.606

photocell

noun 0.604

photoreceptor

noun 0.602

photon

noun 0.590

photoelectron

noun 0.589

radiometer

noun 0.585

photopigment

noun 0.583

photoelectrode

noun 0.577

photoprotein

noun 0.575

photomicrograph

noun 0.570

photophore

noun 0.570

polychromator

noun 0.567

phototransduction

noun 0.566

photocurrent

noun 0.563

light meter

noun 0.563

megapixel

noun 0.562

fluorometer

noun 0.562

picometer

noun 0.562

photovoltaic cell

noun 0.559

photoconductor

noun 0.558

microspectrophotometry

noun 0.558

phot

noun 0.550

spectrophotometer

noun 0.549

photopolymer

noun 0.547

microplate reader

noun 0.547

photomask

noun 0.545

electron microscope

noun 0.543

photonics

noun 0.541

photometry

noun 0.541

photoresponse

noun 0.540

photoluminescence

noun 0.540

monochromator

noun 0.538

photophone

noun 0.535

phototroph

noun 0.534

photoproduction

noun 0.534

positron emission tomography

noun 0.533

optocoupler

noun 0.531

pyrometer

noun 0.531

electron tube

noun 0.530

preamplifier

noun 0.528

amplifier

noun 0.528

photovoltaics

noun 0.527

photographic plate

noun 0.526

photocatalyst

noun 0.526

multimeter

noun 0.526

microphotograph

noun 0.525

photomicrography

noun 0.525

vacuum tube

noun 0.524

pyrheliometer

noun 0.523

multiplexer

noun 0.523

spectrofluorometer

noun 0.522

spectrometer

noun 0.522

voltmeter

noun 0.522

polarimeter

noun 0.522

luminophore

noun 0.522

exposure meter

noun 0.521

photosite

noun 0.521

pyranometer

noun 0.520

electrometer

noun 0.520

photoemission

noun 0.520

optical microscope

noun 0.520

epifluorescence microscope

noun 0.519

photogeneration

noun 0.519

light microscope

noun 0.518

thermopile

noun 0.517

fluorescent tube

noun 0.517

plasma display

noun 0.516

photoconductivity

noun 0.515

micropipette

noun 0.514

fluorophore

noun 0.512

polymethylmethacrylate

noun 0.511

cathode-ray tube

noun 0.511

scintillation counter

noun 0.510

multiplier

noun 0.509

fluorescent lamp

noun 0.509

photoflash

noun 0.509

compound microscope

noun 0.509

microprobe

noun 0.509

biophotonics

noun 0.508

photocopier

noun 0.506

bolometer

noun 0.505

fluorescent

noun 0.505

photosystem

noun 0.505

photoinitiator

noun 0.505

phytochrome

noun 0.503

photog

noun 0.503

particle accelerator

noun 0.503

potentiometer

noun 0.503

photoprint

noun 0.502

multiplicator

noun 0.502