Violet light has a frequency of 7.26 × 1014 Hz and travels at a speed of 3.00 × 108 m/s.

The wavelength of violet light, rounded to the nearest nanometer

The best reason for using a temperature probe instead of a thermometer is:

to record continuous measurements over several minutes

Explanation:

A temperature device may be a device, typically, a thermometer or RTD, that has for temperature measure through an electrical signal. A thermocouple (T/C) is created from 2 dissimilar metals that generate electrical voltage in direct proportion to changes in temperature.