Which of these statements is true?
Light travels in straight lines.
Light is stopped when it meets a solid object.
Light does not travel in straight lines.
Light will only travel for about 2000 km before it stops
Which phrase best completes the following sentence? We see things because:
they are luminous.
the Sun shines on them.
light from them enters our eyes.
light from our eyes shines on them.
Shadows are formed because:
light will only travel a certain distance before it stops.
a substance called ‘darkness’ collects behind some objects.
some objects do not give out light in all directions.
light cannot go through some objects.
Which statement is true?
Sound travels faster than light.
Light does not travel. It is either on or off.
Light travels faster than sound.
Light and sound travel at the same speed.
Opaque objects can:
transmit and reflect light.
transmit and absorb light.
reflect and absorb light.
only reflect light.
Which of these will absorb the most light?
a white sheet of paper.
a sheet of clear glass.
a black piece of card.
an orange piece of card.
How are eyes and pinhole cameras similar?
They both form an upside-down image.
They both use a lens to focus light.
They both convert light to electrical signals.
They both take photographs.
Which part of the eye converts light energy to electrical signals?
the lens
the optic nerve
the pupil
the retina
Light bounces evenly off rough surfaces.
Light bounces evenly off smooth surfaces like mirrors.
Light bounces off mirrors in all directions.
Light does not bounce off mirrors.
A plane mirror is:
a flat mirror.
a curved mirror.
a shiny mirror.
a mirror used in aeroplanes.
How big will the angle of reflection be?
20°
30°
40°
60°
Your image in a mirror:
is not as good looking as I am.
is upside down.
is always bigger than you.
seems to be behind the mirror.
Refraction is what happens when light:
hits an opaque object.
bounces off a mirror.
is scattered unevenly by a rough surface.
changes direction as it goes from one substance into another at an angle.
Refraction occurs because:
light speeds up when it goes from air to glass or water.
light slows down when it goes from air to glass or water.
light stops when it goes from air to glass or water.
light reflects inside transparent materials.
Which diagram shows the correct rays?
Which statement is not true?
A rainbow is a spectrum of colours.
White light is made up of many colours.
A spectrum can only be made using paints.
A prism can split white light into a spectrum.
A red filter:
absorbs red light.
lets through all colours of light.
only lets red light through.
changes all the colours into red light.
Blue objects look blue because:
they reflect all colours.
they refract all colours.
they absorb blue light.
they reflect blue light.
Danny is wearing white shorts and a red shirt. Which statement is most likely to be is true?
In blue light, his shorts look blue and his shirt looks black.
In blue light, his shorts look blue and his shirt looks red.
In red light, his shorts look red and his shirt looks black.
In green light, his shorts look red and his shirt looks yellow.
Why does a lens change the path of light?
Light changes direction when it goes into the glass and when it comes out of it.
Light changes direction in the centre of the lens.
Light is reflected by the surface of the lens.
Light travels faster in glass than it does in air.
Por favor, aguarde! Carregando...