Question Number 38925 by NECx last updated on 01/Jul/18
$${Calculate}\:{the}\:{deviation}\:{of}\:{a}\:{ray}\:{of} \\ $$$${light},{which}\:{is}\:{incident}\:{on}\:{a}\:{plane} \\ $$$${mirror}\:{at}\:{an}\:{angle}\:{of}\:\mathrm{40}°. \\ $$
Answered by tanmay.chaudhury50@gmail.com last updated on 01/Jul/18
$$\delta=\mathrm{180}^{{o}} −\mathrm{2}{i}=\mathrm{180}−\mathrm{80}^{{o}} =\mathrm{100}^{{o}} \\ $$
Commented by NECx last updated on 04/Jul/18
$${oh}.....\:{I}'{m}\:{grateful} \\ $$