Exercise 93 1. Using a ruler and protractor, draw triangle PQR such that line PQ = 10 cm,
angle PQR = 85° and angle RPQ = 29º.
Measure lines PR and RQ.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: