•Question 1 RADIO photons have the lowest
energy.
•
•Question 2 The thickness of a plastic
freezer storage bag is roughly 0.1 mm. How many wavelengths of red light is this?
140 = 0.1mm/7000Angstroms.
•Question 3 ALL statements are true.
•Question 4 Compared to gamma rays, radio
waves travel at the same speed!
• Question
5 Calculate wavelength/diameter for each, pick the smallest value.
a.A 2.3 meter
telescope operating at 2 microns (like WIRO): 9x10-7
•b.The Hubble Space Telescope (2.5 meter) at 150
nanometers: 6x10-8
•c.The Very Large Array (36 km) at 43 GHz (0.65 cm):
1.8x10-7
•d.The 10-meter Keck telescope at 500 nanometers: 5x10-8
•
•Question 6 All statements are true.
•
•Question 7 The correct order of
increasing photon energy:
Radio -- Infrared - optical --
Ultraviolet -- X-ray -- Gamma Rays