Question

Which of the five lighting conditions that we will use today would be the negative control?...

Which of the five lighting conditions that we will use today would be the negative control? Which would be the positive control?

1) white light (all light) 2) no light         3) blue light      4) green light    5) red light

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Answer #1

Positive control would be option- 1(WHITE LIGHT)

Negative control- 2(no light)

A postitive control is a experiment setup, from which it is known that in the presence of the experimental conditions we will get results(or positive results). So, white light has both Red and Blue light and in the presence of white light photosynthesis will definitely occur.

On the other hand, in no-light condition--it is also known that since no light is present, the photosynthesis will not occur. So the getting of the negetive result is also known. Such a experimental setrup is called negetive control.

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