to  throw  light on  something
<abbr style="text-decoration: underline;" title="throw / shed / cast" > throw </abbr>
θrəʊ
threw
light
ʃɛd
shed
on
kɑ:st
kaast
something
laɪt
lait

Definition & Meaning of "throw light on something "in English

to throw light on something
01

to provide someone with information about something ambiguous to make it easier to understand 

to [throw|shed|cast] light on {sth} definition and meaning
Idiom
Informal

What is the origin of the idiom "throw light on something" and when to use it?

The origin of the idiom "throw light on something" is derived from the metaphorical association between light and knowledge or understanding. Light has long been symbolically linked to illumination, clarity, and enlightenment. The idiom likely emerged from this metaphorical connection, reflecting the human desire to gain insight, uncover truths, or reveal hidden aspects. It is commonly used when there is a need to bring clarity, reveal hidden information, or provide explanations.

Examples
The new evidence shed light on what really happened that night. 
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