STE 14169 Experiment Pack

Introductory Optics

INTRODUCTION

This Pack covers all aspects of ray optics form KS3 onwards. The Instructions and Teaching Guide manual describes 32 experiments, for which full equipment is provided in the pack. The whole is well constructed, easy to use and comes in a convenient storage container.

TOPICS COVERED

1.     PROPAGATION OF LIGHT

0 1.1        Light propagates rectilinearly

0 1.2        Shadow

2.     MIRRORS

0 2.1        Reflection on a plane mirror

0 2.2        Images on a plane mirror

0 2.3        Reflection on a concave mirror

0 2.4        Construction of images for a concave mirror

0 2.5        Image of a point by means of a concave mirror

0 2.6        Reflection on a convex mirror

0 2.7        Construction of images for a convex mirror

0 2.8        Image of a point by means of a convex mirror

3.     REFRACTION

0 3.1        Refraction on aplane-parallel plate

0 3.2        Refraction coefficient of glass

0 3.3        Refraction at the transition from air into water

0 3.4        Angle of incidence and angle of refraction

0 3.4.1      Index of refraction of solid matters

0 3.4.2      Calcualtion of the parallel displacement of the plane-parallel plate

0 3.5        The transition from glass into air

0 3.6        Deviating and the reversing prism

0 3.7        Refraction at a prism

4.     LENSES

0 4.1        Refraction at convex lenses

0 4.2        Marginal rays

0 4.3        Constructrion of convex lens images

0 4.4        Image of a point by means of a convex lens

0 4.5        Refraction at a concave lens

0 4.6        Construction of images at a concave lens

0 4.7        Image of a point by means of a concave lens

5.     COLOURS

0 5.1        Colour dispersion

6.     THE EYE

0 6.1        The normal sighted eye

0 6.2        Short-sightedness

0 6.3        Far-sightedness

0 6.4        Presbyopia

EXAMPLE EXPERIMENT

0 4.4       IMAGE OF A POINT BY MEANS OF A CONVEY LENS

(n.b. all worksheets have relevant setup information)

Material:

1 Experimental lamp

1 Single and double slit

1 Plane-convex block

2 Connecting leads

Electric power supply

The image of a punctiform source of light is created by means of a convex lens.

Preparation: The experimental lamp is put on a sheet of paper of which a straight line from the left to the right (optical axis) has been drawn. The experimental lamp is used with the rectangular opening for parallel light (remove covering if necessary and attach it reversely). The double slit is attached to the experimental lamp. The plano-convex lens is placed normal to the optical axis in such a way that the rays strike the plane surface. The focal length of the lens if defined and the focal points are marked.

Experiment: The light opening for divergent light is used (remove covering if necessary and attach it reversely). The double slit is attached to the lamp. The two rays strike the lens slightly inclined to the optical axis. The experimental lamp must be beyond the focal length of the lens. The refracted rays meet in one point, which is the image of the source of light.  Incident and refracted rays are marked by points and the rays are traced after the removal of the lens and the source of light.