SIP ADHING.docx - APPLICABILITY OF CELLULAR PHONE AS...

APPLICABILITY OF CELLULAR PHONE AS SPECTROMETER ON THE
ABSORBANCE OF PLANT LEAF USING LED
April Jeanhien C. Castillo
Verlyn G. Calamba
Reagan T. Bete
GAMUT NATIONAL HIGH SCHOOL
UNIT 3
SURIGAO DEL SUR DIVISION

TABLE OF CONTENTS

INTRODUCTION
A. Background of the Study
Advancement in Science and Technology widens the capacity of living.
Through the new found discoveries, humans’ state of life also changes day by
day. Physical Science as one of the foundation of all the studies about Science,
offers new technique on obtaining the absorbance of plant leaf using LED as
artificial light source and cellular phone as spectrometer.
For many years, LED is considered as one of the useful output of technology
as light source. LED emits visible spectrum that can be observed using
spectrometer. Spectrometer is an instrument used for measuring wavelengths of
light spectra. This device is commonly found in advance and complete science
laboratory. Moreover, this instrument provides accurate data on different studies
involving visible lights. Its usage extends not only on the field of Physics but also
in Biology specifically on the reflectance, transmittance and absorbance of light in
plants.
In this study, a cellular phone is being introduced as spectrometer instead of
the device used in laboratory. It will show the possibility of taking an ordinary cell
phone with a camera to turn into a spectrometer. This study was conducted to
test the applicability of cell phone as spectrometer to analyse the absorbance of
plant leaves coming from LED.
B. Statement of the Problem
This study will use Light Emitting Diode as a light sources and a cellular
phone as spectrometer to analyze the absorbed light from a plant leaf.
Specifically this study aims to:

1. Investigate the capability of cellular phone as spectrometer.
2. Identify the absorption spectra of plant leaf using LEDs as light source
employing a cellular phone spectrometer.