Technical data

Influence of surface on the absorption of solar energy

Article no: P9513200

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> Principle

In this experiment a white tent in the desert will be simulated by means of a white absorber plate which is exposed under a halogen lamp for 5 minutes. The temperature difference before and after the irradiation is compared to that of a black absorber plate. The outcome of this is that the white plate absorbes less solar energy and thus heats up less.
The students should apply the results on practical examples, for instance the white tent of the bedouins and the black skin of the polar bear.

Benefits

Experiment is part of a complete solution set with a total of 17 experiments for Renewable Energy Basics and Heat energy
Safe experimentation: the lamp is protected against touch, the housing is well ventilated with the aid of holes and is only slightly heated
Stable setup by using the optical bench

Tasks

Why do the bedouins live in white tents?
This experiment examines how black and white absorber plates behave under irradiation by a halogen lamp.

Learning objectives

Heat absorption of different surfaces

Scope of delivery

Halogen lamp with reflector, 12V / 20W	05780-00	1
Mount for halogen lamp with reflector	05781-00	1
Solar collector for student experiments	05760-00	1
Support base, separable for 2 rods	02001-00	1
Slide mount for optical bench	09822-00	1
Measuring tape, l = 2 m	09936-00	1
Support rod, l = 600 mm, d = 10 mm, split in 2 rods with screw threads	02035-00	2
Digital stopwatch, 24 h, 1/100 s and 1 s	24025-00	1
Lab thermometer,-10..+110 °C	38056-00	1
PHYWE Power supply, 230 V,DC: 0...12 V, 2 A / AC: 6 V, 12 V, 5 A	13506-93	1