Reflection+of+science+topic+-+Reflection+&+Refraction





This is a physic topic. For reflection and refraction, we learnt about how the light can reflect or refract to form different images. For reflection, we learnt about how the light can reflect on different surfaces. When a light is being shined on a surface, the light will be reflected to form an image at different position. During reflection of light, the angle of incidence is always the same as the angle of reflection. For reflection, we also learnt how to draw diagrams to show how light rays from an object are being reflected. In the process of drawing the diagrams, we have to always make sure that we have include the things that necessary, such as the virtual image, arrows to show the direction of the light pointing towards and lines of reflection.

For refraction, it is a process where light rays are being bent when passing through from a dense material to a denser material such as from air to glass, or vice versa. So the refraction happens because the density of the materials are different, which affects how fast the light rays can travel in these materials. And thus the light rays are being bent. For a light ray to pass through from dense material to a denser material, the light rays always bent towards the normal. Also, we learn that different materials have different refractive index. Refractive index is used to calculate how much the light ray will bend when passing through that particular material.


For this topic, I feel that the most difficult part is to learn how to draw the diagrams, both reflection and refraction. We have to make sure that we measure correctly each angle and distance between the real image and the virtual image. Also, we have to always indicate which rays are real and which rays are not real. It is very easy to lose marks in the test when we forget to include all the necessary parts of the diagrams.