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Question:

gary-student-09
gary-student-09
Student
High School - 9th Grade

What colored light helps beans grow better?

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Posted by gary-student-09 on Tuesday November 3, 2009 at 4:31 PM and tagged with plants, science.

Answers:

  1. giorgiana1976
    giorgiana1976 Teacher
    Doctorate

    eNotes Editor

    Based on the fact that the color of something represents the color reflected and not absorbed, we could conclude that the color of beans, which means green, is not that color which beans would absorbe it in order to help them to grow better. So we have to look for another color to be absorbed, except green.

    Experiments proved that red light helps the beans' photosynthesis, the plant having an absorbtion maximum nearby the wavelength of  660nm, which is the red's value . The combination between red and blue light has proved to be very helpful to plant's flowering and fruiting. 

    Also another absorbtion maximum was recorded nearby the wavelength of blue light, which has about 450nm. Blue light proved it's efficiency in plant's growing, blue wavelengthes carrying a great amount of sunlight energy.

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    Posted by giorgiana1976 on Thursday November 5, 2009 at 7:19 AM

  2. mamta88
    mamta88 Student
    Graduate School

    Red colored light helps beans to grow best in 30 days....

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    Posted by mamta88 on Thursday November 5, 2009 at 7:27 AM