A mixture of yellow light of wavelength 3800 A and blue light of wavelength 4000 A is incident normally on air film of 0-00019 mm thickness- The colour of reflected light is-A- greyB- redC- blueD- violet

The correct option is A greyDestructive interference for yellow. ∵ 2t=λ_y ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Huygens' Principle

A mixture of ...

Question

A mixture of yellow light of wavelength $3800 \circ A$ and blue light of wavelength $4000 \circ A$ is incident normally on air film of 0.00019 mm thickness. The colour of reflected light is:

red

No worries! We‘ve got your back. Try BYJU‘S free classes today!

blue

No worries! We‘ve got your back. Try BYJU‘S free classes today!

violet

No worries! We‘ve got your back. Try BYJU‘S free classes today!

grey

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D grey
Destructive interference for yellow.
$∵ 2 t = λ_{y}$

Suggest Corrections

Similar questions

A mixture of yellow light of wavelength 580nm and blue light of wavelength 450nm is incident normally on an air film of thickness 2.9x10^2 nm. The colour of the first order of reflected light is

A. Red

B. Blue

C. Violet

D. Yellow

Please also explain what is meant by first order reflected light and how the answer is B.

Q. A light of wavelength

5890

A falls normally on a thin air film. The minimum thickness of the film such that the film appears dark in reflected light is

Q. A parallel beam of white light is incident on a thin film of air of uniform thickness. Wavelengths

7200 ˚ A

and

5400 ˚ A

are observed to be missing from the spectrum of reflected light viewed normally. The other wavelength in the visible region missing in the reflected spectrum is

Q. The parallel rays of white light are made an incident normally on an air film of uniform thickness.

250

fringes are seen in the transmitted light between

4000 A^{o}

and

6500 A^{o}

. Thickness of air film is

Q. White light is incident normally on a soap film of thickness

15 \times 10^{- 5} c m

and refractive index

1.33

. Which wavelength is reflected maximum in the visible region?

Join BYJU'S Learning Program

A mixture of yellow light of wavelength 3800 ∘A and blue light of wavelength 4000 ∘A is incident normally on air film of 0.00019 mm thickness. The colour of reflected light is:

The correct option is D greyDestructive interference for yellow. ∵2t=λy

A mixture of yellow light of wavelength $3800 \circ A$ and blue light of wavelength $4000 \circ A$ is incident normally on air film of 0.00019 mm thickness. The colour of reflected light is:

The correct option is D grey
Destructive interference for yellow.
$∵ 2 t = λ_{y}$