Answer :
We an see all three objects clearly in the visible part of the spectrum, even though the peak intensity might lie outside that region because we perceive only what lies in the visible region.
The sun and Sirius A emits light in every part of the electromagnetic spectrum. But our eyes cannot perceive every frequency of light. We see only what can be perceived by a human eye. Just because we cannot see other spectrum does not mean that it is not present.
The visible spectrum of light is 400 nm to 780 nm. The colours are:
- Violet - 400 to 420 nm
- Indigo - 420 to 440 nm
- Blue - 440 to 490 nm
- Green - 490 to 570 nm
- Yellow - 570 to 585 nm
- Orange - 585 to 620 nm
- Red - 620 to 780 nm
Therefore, we can see all three objects clearly in the visible part of the spectrum, even though the peak intensity might lie outside that region because we perceive only what lies in the visible region.
The given question is incomplete. The complete question is:
Consider three objects - Sirius A, Sun and light bulb. We can see all three objects clearly in the visible part of the spectrum, even though the peak intensity might lie outside that region. why is this so?
To know more about peak intensity
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