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This question already has an answer here:

I link 3 figures below .

enter image description here enter image description here

The white bulbs were on my backside on the ceiling as is visible in their reflection in the television. I was sitting almost between (length wise) the bulbs and the television. I took the photographs of their reflection in the LCD.

What are these crosses of rainbow coloured fringes?

Is it interference or diffraction?

And whatever of the 2 it is, how is it happening?

Why only 2 crosses of coloured fringes in the reflection of every bulb , when the angle of each bulb is different?

The bulbs were on my backside so Lloyd's mirror like explanation isn't possible.

Why only 2 crosses of coloured fringes are appearing in the reflection of all the bulbs when they are at different angles?

How is this being caused?

I don't know whether stack exchange is the right place to ask this question by uploading the pictures related to the question , but I couldn't find anyone who could give a reasoning and so I posted it here.

Ever more interesting is that the reflection of the CFL visible in 1st and 2nd pictures is not showing any such pattern.

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marked as duplicate by Qmechanic Aug 29 '16 at 14:31

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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    $\begingroup$ Duplicate? although the pictures are much better here. physics.stackexchange.com/q/160319 $\endgroup$ – Farcher Jul 31 '16 at 18:40
  • $\begingroup$ @Farcher But why are only 2 crosses forming in the reflection of every bulb and what is causing them ? How is interference happening here ? $\endgroup$ – Shashaank Jul 31 '16 at 18:43
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    $\begingroup$ Here is another post. physics.stackexchange.com/q/167892 $\endgroup$ – Farcher Jul 31 '16 at 18:56