HOW TO WRITE INQUIRY QUESTION AND DRAW RAY DIAGRAMS FOR EXPERIMENTS USING LENSES?
Syllabus DOT POINT:
3.4a. Conduct a practical investigation to analyse the formation of images in mirrors and lenses via reflection and refraction using the ray model of light (ACSPH075)
EXPERIMENT (A) Physics Practical Investigation: (B) Refraction of rays through convex and concave lenses.
AIM: To analyse the formation of reflected images from convex and concave lenses.
INQUIRY QUESTION: Link inquiry question to the aim of the experiment and write a hypothesis in the form of a question. Examples of inquiry question are as given below.
- What are the properties of reflected images formed from convex and concave lenses and how are these images formed?
- How are the reflected images in convex and concave lenses formed and what are the properties of these images?
- How to use ray diagrams to determine the properties of images formed from convex and concave lenses?
What are the characteristics or properties of the reflected image? It is helpful to use SLOT – where:
S – represents the size of the image (same size, magnified or diminished (smaller) compared to the object.
L – represents the location of the image (how far is it from the mirror).
O- represents the orientation of the image (upright or inverted)
T- represents the type of the image (real or virtual). Real images refer to images formed on the same size as the object and can be captured on a screen. Virtual images are formed on the opposite side of the object.
(i) size of the image compared to the actual object (same size or magnified (larger) or diminished (smaller)
(iii) laterally inverted (left-right reversed)
(iv)real (means the image is formed on the same size of the mirror as the object and can be observed by placing a screen
or virtual (means the image is formed on the opposite side of the mirror as the object and like see your image behind the mirror).
HOW TO DRAW RAY DIAGRAMS CORRECTLY IN A SCIENTIFIC INVESTIGATION?
A – Experiment Using Lenses – Drawing Ray diagrams and description of image
1.1 Convex Lens
1.2 Concave lens
|Ray diagrams -Poorly drawn||Ray diagrams – correctly drawn||Description of image
Characteristics or properties of the image)
||(i) If the object is placed further than the focal point, the image is:
(ii) If the object is placed closer than the focal length, the image
(iii) If the object is placed at the focal length,