The phrase "a wavelength of two" is correct and usable in written English.
It can be used in contexts related to physics, particularly in discussions about waves, such as light or sound waves, where specific wavelengths are being referenced.
Example: "The experiment was designed to measure the effects of light at a wavelength of two nanometers."
Alternatives: "a wavelength measuring two" or "a wavelength equal to two".
This material preferentially absorbs, and is thus heated and expanded by, infra-red radiation with a wavelength of three microns (millionths of a metre).
Observations at a wavelength of 3 mm (86 102 GHz) started in October 2006, and the detections of six clusters by the Sunyaev-Zel'dovich effect were announced in 2008.
Jozsef Seres from the Technical University of Vienna and co-workers built a source of coherent one-kiloelectronvolt X-rays (at a wavelength of about one nanometre).
In this work laser sintering is demonstrated with the use of an ultrafast, femtosecond (100 fs) pulsed laser operating at a wavelength of 1045 nm and two existing calcium phosphate minerals (brushite and hydroxyapatite) which have been improved after doping with iron (10 mol%).
Measurements were performed on a multichannel laser-Doppler flowmeter (PeriFlux 4001 Master Perimed ABB, Jarfalla, Sweden) at a wavelength of 780 nm, using two probes (PF 415:42) with fiber separation of 0.5 mm.
To get round this, Dr Maruo and Dr Ikuta picked a material whose molecules solidify only when hit simultaneously by two photons from different lasers.Using this technique, the two researchers have managed to build 3D structures with features as small as a wavelength of light (a few hundred nanometres).
Brewster's law also states that the tangent of the angle of polarization, p, for a wavelength of light passing from one substance to another is equal to the ratio of the refractive indices, n1 and n2, of the two contacting mediums: tan p = n2/n1.
The system comprised a laser with integrated collimator emitting green light at a wavelength of (lambda = 520) nm, two lenses with a focal length of (f = 150) mm, an iris diaphragm, and a for constructing the new (2048 times 2048) pixel CCD detector.
A broadband of 1310 nm (from 1190 to 2500 nm) covering the two communication wavelengths of 1.31 μm and 1.55 μm for the crosstalk as high as 20 dB is obtained, providing a wavelength coverage of six bands in the O + E + S + C + L + U telecom wavebands over a 500-μm-long PCF simultaneously.
Cord blood samples (5 ml) were obtained for each neonate in a metal-free K3 EDTA bulb and analyzed within 48 hours of sample collection for blood lead by flameless atomic absorption spectrophotometry (Hitachi Z-8000) in parts per billion at a wavelength of 283.3 nm with a slit width of 1.3 nm using the method described by Lagesson et al [ 29].
