The light from a torch is normally incident on the surface at intensity of illumination I1. If the surface is tilted to 45∘ from initial position, then what will be intensity of illumination I2 on the surface in terms of I1 ?

The light from a torch is normally incident on the surface at intensit

1.	The light from a torch is normally incident on the surface at intensity of illumination I1. If the surface is tilted to 45∘ from initial position, then what will be intensity of illumination I2 on the surface in terms of I1 ?
Answer» The light from a torch is normally incident on the surface at intensity of illumination $I_{1}$ . If the surface is tilted to $45^{\circ}$ from initial position, then what will be intensity of illumination $I_{2}$ on the surface in terms of $I_{1}$ ?

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The light from a torch is normally incident on the surface at intensity of illumination I1. If the surface is tilted to 45∘ from initial position, then what will be intensity of illumination I2 on the surface in terms of I1 ?

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