P4 Science · Chapter 16brightbit.net/worksheets
Light — Reflection and Refraction
Name: ______________________Class: ________Date: ____________Score: ____ / 10
- 1.
What is reflection of light?
(a) The bending of light as it passes from one medium to another(b) The bouncing back of light when it hits a surface(c) The absorption of light by a dark surface(d) The splitting of white light into colours
- 2.
The Law of Reflection states that the angle of incidence equals ___.
(a) The angle of refraction(b) The angle of reflection(c) Half the angle of refraction(d) 90°
- 3.
What is refraction of light?
(a) The absorption of light by a material(b) The bending of light as it passes from one medium to another of different density(c) The reflection of light off a curved mirror(d) The scattering of light by small particles
- 4.
A pencil placed in a glass of water appears bent at the water surface. This is because ___.
(a) The water exerts pressure on the pencil bending it(b) Light refracts (bends) as it passes from water to air, making the pencil appear displaced(c) The pencil reflects light differently in water(d) The water magnifies the lower part of the pencil
- 5.
Which of the following is a use of mirrors based on the reflection of light?
(a) A magnifying glass(b) A periscope(c) A prism splitting white light(d) Spectacles for a short-sighted person
- 6.
When white light passes through a glass prism, it splits into a spectrum of colours. This is called ___.
(a) Reflection(b) Refraction only(c) Dispersion(d) Absorption
- 7.
A ray of light hits a mirror at an angle of incidence of 35°. What is the angle of reflection?
(a) 55°(b) 35°(c) 70°(d) 90°
- 8.
Why does a swimming pool appear shallower than it actually is?
(a) The water bends light making the bottom appear closer to the surface than it really is(b) The water acts as a mirror reflecting the sky(c) The water expands when heated making the pool shallower(d) The tiles at the bottom are white making it look shallow
- 9.
State the difference between regular reflection (from a mirror) and diffuse reflection (from a rough surface).
- 10.
A student shines a ray of light from air into a glass block. She notices the ray bends towards the normal as it enters the glass. Explain why this happens.
Answer key — P4 Science: Light — Reflection and Refraction
For parents. Step-by-step explanations for every question are free on brightbit.net.
- 1.(b) The bouncing back of light when it hits a surface
- 2.(b) The angle of reflection
- 3.(b) The bending of light as it passes from one medium to another of different density
- 4.(b) Light refracts (bends) as it passes from water to air, making the pencil appear displaced
- 5.(b) A periscope
- 6.(c) Dispersion
- 7.(b) 35°
- 8.(a) The water bends light making the bottom appear closer to the surface than it really is
- 9.regular reflection: parallel rays reflect parallel and form a clear image; diffuse reflection: rays scatter in many directions from a rough surface and no clear image is formed
- 10.light slows down when entering the denser glass so it bends towards the normal
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