Add FM/AM radio wavelengths

presets/objects.js

@@ -683,8 +683,10 @@ function makeObjects() {
                 ["S-band microwaves (ovens, wifi)", math.unit(11, "cm")],
                 ["L-band microwaves (GPS)", math.unit(22, "cm")],
                 ["UHF", math.unit(50, "cm")],
+                ["FM radio", math.unit(3.5, "m")],
                 ["VHF", math.unit(5, "m")],
                 ["HF", math.unit(50, "m")],
+                ["AM radio", math.unit(250, "m")],
                 ["MF", math.unit(500, "m")],
                 ["LF", math.unit(5, "km")],
                 ["VLF", math.unit(50, "km")],