A pulsed laser used in a micro-machining process emits radiation where each photon has an energy of 5.3 × 10-19 J.
Which row in the table correctly identifies the region of the electromagnetic spectrum this radiation belongs to, and its wavelength in a vacuum?
Take Planck's constant h=6.63×10−34 J sh = 6.63 \times 10^{-34} \text{ J s}h=6.63×10−34 J s and the speed of light in a vacuum c=3.00×108 m s−1c = 3.00 \times 10^8 \text{ m s}^{-1}c=3.00×108 m s−1.
Region: Ultraviolet; Wavelength: 3.8×10−7 m3.8 \times 10^{-7} \text{ m}3.8×10−7 m
Region: Infrared; Wavelength: 3.8×10−7 m3.8 \times 10^{-7} \text{ m}3.8×10−7 m
Region: Infrared; Wavelength: 3.8×10−6 m3.8 \times 10^{-6} \text{ m}3.8×10−6 m
Region: Ultraviolet; Wavelength: 3.8×10−6 m3.8 \times 10^{-6} \text{ m}3.8×10−6 m
