The ozone layer absorbs radiation of wavelengths
Name the radiations of wavelength just (a) longer than 8×10−7m, (b) shorter than 4×10−7m.
Using the number line write the integer which is:
(a) 3 more than 5
(b) 5 more than −5
(c) 6 less than 2
(d) 3 less than −2