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How is light reflected? micro-lesson

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How is light reflected? Reflection is when light bounces off the surface changing the direction of a ray of light. Now, all objects do reflect light, but smooth and shiny surfaces reflect all rays of light at the same angle. Rough or dull surfaces will scatter the rays of light. The light ray that hits a mirror or another reflective object is called the incident ray, the ray that comes from the light source, and the rate that bounces off is known as the reflective ray, the light that's being reflected. The Law of Reflection says that the angle of incidence must always be equal to the angle of reflection. So, if a light ray hits the mirror at 45 degrees, it will be reflected at 45 degrees. Now, looking at this diagram, that thick black line is called the normal ray and that's drawn perpendicular to the reflective surface. So, the Law of Reflection will say that the angle of incidence, which is the angle between the incident rate and the normal line, must be the same as the angle of reflection, that angle between the normal line and the reflected ray.

Kids earn more screen time by answering fun educational questions.

• If the angle of incidence is 38 degrees, what will the angle of reflection be?

1) 38 degrees
2) 90 degrees
3) 152 degrees
4) 52 degrees
• What does light do when it hits a reflective surface?

1) Bounce
2) Go through
3) Bend
4) Stop
• What is the ray which bounces off the surface called?

1) reflected ray
2) incident ray
3) secondary ray
4) source ray
• What is the light ray that hits the object called ?

1) incident ray
2) reflected ray
3) initial ray
4) source ray
• What objects reflect light at the same angle?

1) smooth and shiny objects
2) rough objects
3) all objects
4) no objects
• What is the angle of incidence?

1) the angle at which the light hits an object from the light source
2) the angle at which the light bounces off an object
• What is the angle of reflection?

1) the angle at which the light bounces off an object
2) the angle at which the light hits an object from the light source
• What is the law of reflection?

1) when rays of light reflect, the angle of the reflection is the same as the angle of incidence
2) When rays of light reflect, they always do it twice
3) when rays of light reflect, the angle of the reflection is greater than the angle of incidence
4) when rays of light reflect, the angle of the reflection is less than the angle of incidence
• What is reflection?

1) when light bounces off a surface, changing the direction of the light wave
2) when the light goes through an object and makes another identical image
3) when the light goes through an object and travels in a straight line - when you see the same thing twice
• If you know the angle of incidence, how do you work out the angle of reflection?

1) it is the same as the angle of incidence
2) You subtract the angle of incidence from 90 degrees
3) You add the angle of incidence to 90 degrees
4) The angle of reflection is half the angle of incidence

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Niamh Clark

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