Q1.          An actor is on a stage in a theatre. A spotlight is shining on him.

(a)     A ray of light travels from the spotlight to the actor.
(i)      Which line shows the ray?  Give the correct letter.
…………
1 mark

(ii)     How long does the light take to travel from the spotlight to the actor?
         Tick the correct box.
about a hundred millionth of a second           
about a tenth of a second                              
about a second                                              
about ten seconds                                         
1 mark

(b)     The actor’s voice sounds different to the people in the front and back rows of the audience.
(i)      How does the actor’s voice sound different to a person in the back row?
……………………………………….……………………………………….
……………………………………….……………………………………….
1 mark
(ii)     Complete the sentence with longer, shorter or exactly the same.
         When the actor is at the back of the stage, the time his voice
         takes to reach the audience is .…………………………… .
1 mark
Maximum 4 marks

 

Q2.          A teacher has a small torch. He switches it on and points it towards a mirror.

(a)     A ray of light from the torch reflects off the mirror. Use a ruler to draw the ray of light:
(i)      from the torch to the mirror;
1 mark
(ii)     reflecting off the mirror.
2 marks
Add arrows to the rays to show the direction of the light.

(b)     A laser beam is a very bright and powerful beam of light. It is very dangerous to point a laser beam towards people or animals.
Which part of the body can be most easily damaged by a laser beam?
....................................................
1 mark
Maximum 4 marks

 

Q3.          (a)     The diagram below shows George using his laptop.
Light from the lamp is reflected by the laptop screen.

(i)      On the diagram above draw a ray of light to show how George sees the light from the lamp reflected by the laptop screen. Use a ruler.
         Draw arrows to show the direction of light.
3 marks

(ii)     With the laptop screen in the position shown in part a(i), George sees an image of the lamp on the screen.
George tilts the screen forwards as shown below.

         When the screen is tilted forwards it is easier for George to see the words on the screen.
What happens to the reflected ray of light when the screen is tilted?
...............................................................................................................
...............................................................................................................
1 mark

maximum 4 marks