Page 254 - Physics Form 5 KSSM_Neat

Photoelectric Effect Applications
Figure 7.16 shows some examples of applications of photoelectric effect.

KEMENTERIAN PENDIDIKAN MALAYSIA
LED lamps along the road which
are powered by solar cells are
energy efficient and environmentally
friendly. In daylight, the
photoelectric effect of solar cells
enables electrical energy to be stored
in the battery. At night, the LED
lamps will light up with the power
from the battery.

The Noor Complex Solar Power
Plant located in the Sahara Desert
is the world’s largest concentrated
solar power plant. This station is
expected to be completed in 2020 Applications of Photoelectric E ect
and is capable of producing 580
MW capacity for use by 1 million
residents.

Light detectors at the automatic
doors use infrared beam and
photocells as switches. When the
light path is disturbed, photoelectric
current in the photocell circuit will
be disconnected and the door will
remain open.

Figure 7.16 Examples of applications of photoelectric effect

244 LS 7.3.6