Solar Grasshopper, approx. 5 x 2 cm

When sunshine falls on the grasshopper's photovoltaic cell, it begins to dance with joy! This happens thanks to a vibration motor, which causes the model to shake vigorously and thus creates movement.

This funny solar grasshopper scuttles about as soon as sufficient sunlight strikes the photovoltaic cell. The moment you hold your hand or a piece of paper over it, it comes to a halt. The grasshopper shows pupils how radiation energy is transformed into kinetic energy. This is a fun and vivid way to learn about how useful renewable energy can be.

This solar grasshopper is an application of the photoelectric effect. In other words, the function of the solar grasshopper depends on the wavelength of the light falling on it. The solar grasshopper is designed for use in direct sunlight. It is important to remember that the solar grasshopper will not work as well or at all during winter in central and northern Europe due to the absorption processes in the atmosphere. These experiments are best carried out during the summer term. Windowpanes often contain filters to absorb UV and thermal radiation. This can limit the functionality of the solar grasshopper. If you want to use artificial light with the grasshopper, you will need a spectral lamp or arc lamp from your physics department. The solar grasshopper will function poorly or not at all if using traditional light sources.

Dimensions: 5 cm long and approx. 2 cm high

• powered by solar energy
• moves when sunny, stays still in shade
• learn about renewable energy

Please note:
Battery/electronic device disposal