The emissivity of the gray surface may be expressed as – McqOptions

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1.	The emissivity of the gray surface may be expressed as
A.	‚âà√¨‚àö√¢ /2 ‚âà√¨‚àö√¢ <sub>b</sub>
B.	‚âà√¨‚àö√¢ / 3 ‚âà√¨‚àö√¢ <sub>b</sub>
C.	‚âà√¨‚àö√¢ / ‚âà√¨‚àö√¢ <sub>b</sub>
D.	¬¨¬®≈í¬© ‚âà√¨‚àö√¢ / ‚âà√¨‚àö√¢ <sub>b</sub>
Answer» D. ¬¨¬®≈í¬© ‚âà√¨‚àö√¢ / ‚âà√¨‚àö√¢ <sub>b</sub>

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