Difract or Diffract: How To spell?
The word Difract is misspelled against Diffract, a verb meaning "To break or separate into parts; to deflect, or decompose by deflection, a/ rays of light."
Diffract has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Di & ract which should not be misspelled with single 'F'
Wrong Spelling:  Di-f-ract  Correct Spelling:  Di-ff-ract 
Find more wrongly spelled words of Diffract to spell it well.