A parallel beam of monochromatic light of intensity $$I0$$ is incident on a glass plate, $$25$$% of light is reflected by upper surface and $$50$$% of light is reflected from lower surface. The ratio of minimum and maximum intensity in interference region of reflected light is

Question

A parallel beam of monochromatic light of intensity $$I0$$ is incident on a glass plate, $$25$$% of light is reflected by upper surface and $$50$$% of light is reflected from lower surface. The ratio of minimum and maximum intensity in interference region of reflected light is

Infinity Learn · Accepted Answer

Intensity of reflected light from upper surface is $$I1=I0$$×$$25100=I04$$ And intensity of transmitted light from upper surface is I'$$=I0$$−$$I04=3I04$$  The intensity of reflected light from lower surface is $$I2=3I04$$×$$50100=3I08$$   ∴$$IminImax=I1$$−$$I22I1+I22=I04$$−$$3I082I04+3I082$$ $$=$$ $$12$$−$$38212+382$$

A parallel beam of monochromatic light of intensity $I_{0}$ is incident on a glass plate, 25% of light is reflected by upper surface and 50% of light is reflected from lower surface. The ratio of minimum and maximum intensity in interference region of reflected light is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

A parallel beam of monochromatic light of intensity I0 is incident on a glass plate, 25% of light is reflected by upper surface and 50% of light is reflected from lower surface. The ratio of minimum and maximum intensity in interference region of reflected light is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

A parallel beam of monochromatic light of intensity $I_{0}$ is incident on a glass plate, 25% of light is reflected by upper surface and 50% of light is reflected from lower surface. The ratio of minimum and maximum intensity in interference region of reflected light is