And Professor Langley's observations with the bolometer indicate the existence of waves with as low a vibration-period as one billion per second, and even here, in all probability, the limit has not been reached.
They really left the question open as to whether the effect of Pyrophorus light on their bolometerwas due to the visible band of rays or to this plus another band in the infra-red.
After passing through the grating, the rays are reflected at M(sub)3 and are thereby focussed on to a bolometer strip placed at B.
The strip of the bolometer is first coated with lamp-black and the spectrum of the incident radiation is explored in exactly the same way as is described in Chapter III.
By means of Langley's bolometer the distribution of energy in the spectrum has been measured accurately, with the results of confirming and amplifying the general results just stated.
For the heat rays a Langley's bolometer strip is placed at F, in fact the bolometer strip might be used throughout, but it is not quite so sensitive for the visible and ultraviolet rays as the eye and the photographic plate.
Kennedy lost no time in confirming the suspicions of his bolometer as to the cause of the death of the two innocent victims of the machinations of the Clutching Hand.
Then Kennedy began carefully examining the bolometer and some other recording instruments he had, while the rest of us watched, fascinated.
For five minutes before second contact, the bolometer was successfully exposed to the region of the sky close to the narrowing crescent of the sun where the corona was shortly to appear.
The height of the ordinate at each point would represent the energy included between given limits of wave-length, depending on the width of the bolometer strip and the slit.
Langley with the spectro-bolometer on the infra-red spectrum of sunlight, demonstrated the existence of marked absorption bands, some of which are due to water vapour.
Paschen, and Lummer and Pringsheim verified this relation by observing with a bolometerthe intensity at different points in the spectrum produced by a fluorite prism.
Observations taken with a bolometer along the length of a normal or wave-length spectrum, would give the form of the curve plotted on a wave-length base.
Supposing that the bolometerstrip had a width corresponding to .
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "bolometer" in a variety of sentences. We hope that you will now be able to make sentences using this word.
