24.36- Energy in Electromagnetic Waves Lasers can be constructed that produce an

Question

24.36- Energy in Electromagnetic Waves Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time-called pulsed lasers. They are used to ignite nuclear fusion, for example. Such a laser may produce an electromagnetic wave with a maximum electric field strength of 1.00x1011 v/m for a time of 1.00 ns. What is the maximum magnetic field strength in the wave? 334 T You are correct. Your receipt no. is 163-545 Trie What is the intensity of the beam? 1.33x1019 w/mA2 You are correct. Your receipt no. is 163-1466 Previous Tries What energy does it deliver on a 1.10-mm2 area? 16093 J Submit Answer Incorrect. Tries 3/10 Previous Tries

Explanation / Answer

1. B = E / v

B = (1 x 10^11) / (3 x 10^8)

B = 333.33 T

2. intensity = Im Bm / 2 u0

= (1 x 10^11) (333.33) / (2 x 4pi x 10^-7)

= 1.326 x 10^19 W/m^2

3. Energy = intensity x area x time

= (1.326 x 10^19 W/m^2) (1.10 x 10^-6 m^2) (1 x 10^-9 s)

= 1.46 x 10^4 J

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.