Thick slabs of stainless steel (k = 14.9 W/m K and = 3.95 10

Thick slabs of stainless steel (k = 14.9 W/m · K and α = 3.95 × 10^-6 m²/s) and copper (k = 401 W/m · K and α = 117 × 10^-6 m²/s) are placed under an array of laser diodes, which supply an energy pulse of 5 × 10⁷ J/m² instantaneously at t = 0 to both materials. The two slabs have a uniform initial temperature of 20°C. Determine the temperatures of both slabs, at 5 cm from the surface and 60 s after receiving an energy pulse from the laser diodes.

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x' Array of laser diodes Stainless steel slab Array of laser diodes Copper slab