GCSE Biology – Lenses – Primrose Kitten

GCSE Biology – Lenses

Last updated: 21/03/2021

OCR Gateway GCSE Science – Biology foundation Coordination and control – the nervous system GCSE Biology – Lenses

Learning Objectives

-I can describe how convex and concave lenses are used to correct eyesight
-I can describe the difference between hard and soft contact lenses

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Question 1 of 35

1. Question
How do lenses form images?
- By refracting light
- By absorbing light
- By reflecting light
- By destroying light
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Question 2 of 35

2. Question
What is a convex lens?
- A lens which bulges outwards in the middle
- A lens which bulges outwards at the sides
- A lens which caves inwards in the made
- A flat lens
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Question 3 of 35

3. Question
What is the other name for convex lenses?
- Converging lenses
- Diverging lenses
- Concave lenses
- A flat lens
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Question 4 of 35

4. Question
What does a converging lens do to rays of light?
- Causes parallel rays of light to be brought together
- Causes parallel rays of light to be dispersed
- Causes parallel rays of light to be absorbed
- Causes parallel rays of light to be destroyed
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Question 5 of 35

5. Question
What is the name for rays of light being brough together?
- Converging
- Diverging
- Convex
- Concave
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Question 6 of 35

6. Question
At what point are parallel rays brought together in a converging lens?
- At the principle focus
- At the main focus zone
- At the main focus region
- At the axis
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Question 7 of 35

7. Question
What is a concave lens?
- A lens which caves inwards in the middle
- A lens which bulges outwards in the middle
- A flat lens
- A circular lens
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Question 8 of 35

8. Question
What is the other name for concave lenses?
- Diverging lenses
- Converging lenses
- Convex lenses
- Diverse lenses
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Question 9 of 35

9. Question
What does a diverging lens do to rays of light?
- Causes parallel rays of light to spread out
- Causes parallel rays of light to not change direction
- Causes parallel rays of light to come together
- Causes parallel rays of light to be absorbed
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Question 10 of 35

10. Question
What is the name for rays of light spreading out?
- Diverging
- Converging
- Convex
- Concave
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Question 11 of 35

11. Question
What is the principle focus of a converging lens?
- Where the rays hitting the lens parallel to the axis meet
- Where the rays hitting the lens parallel to the axis disperse
- Where the rays hitting the lens parallel to the axis are destroyed
- Where the rays hitting the lens parallel to the axis are absorbed
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Question 12 of 35

12. Question
What is the principle focus of a diverging lens?
- Where rays hitting the lens parallel to the axis appear to come from
- Where rays hitting the lens perpendicular to the axis appear to come from
- Where rays hitting the lens parallel to the axis come from
- Where rays hitting the lens perpendicular to the axis come from
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Question 13 of 35

13. Question
What is the axis of a lens?
- A line passing through the middle of a lens
- A line passing through the top of a lens
- A line passing through the bottom of a lens
- A line passing through the edge of a lens
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Question 14 of 35

14. Question
What happens if any light ray passes through the axis of a lens?
- It is transmitted without changing direction
- It is absorbed without changing direction
- It is destroyed
- It changes direction
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Question 15 of 35

15. Question
Where is the principle focus?
- There is a principle focus each side of the lens
- There is a principle focus behind the lens only
- There is a principle focus in front of the lens only
- Most lenses do not have a principle focus
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Question 16 of 35

16. Question
What is the distance from the centre of the lens to the principle focus called?
- The focal length
- The focal distance
- The focus length
- The focus distance
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Question 17 of 35

17. Question
Where are images formed?
- At points where light rays from a point on an object appear to come together
- At points where light rays from a point on an object move apart
- At points where light rays from a point on an object are destroyed
- At points where light rays from a point on an object disappear
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Question 18 of 35

18. Question
What are the two types of image that can be formed by lenses?
- Real images and virtual lenses
- Real images and fake images
- Virtual images and expensive images
- Real and false images
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Question 19 of 35

19. Question
What is a real image?
- Where the light rays actually come together
- Where the light rays don't actually come together
- Where all light rays are absorbed
- Where all light rays are destroyed
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Question 20 of 35

20. Question
What can a real image do?
- It can be captured on a screen
- It cannot be captured on a screen
- It cannot be photographed
- It is not real
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Question 21 of 35

21. Question
What is a virtual image?
- Where the light rays only appear to come together, but don't actually
- Where only some of the light rays come together
- Where the light rays are all absorbed
- Where the light rays are all destroyed
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Question 22 of 35

22. Question
What can’t a virtual image do?
- Be captured on a screen
- Be seen
- Be seen in a mirror
- Be captured in a picture
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Question 23 of 35

23. Question
The image produced by a convex lens can be…
- Real or virtual
- Always real
- Always virtual
- Mostly real
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Question 24 of 35

24. Question
The image produced by a concave lens is…
- Always virtual
- Always real
- Real or virtual
- Mostly real
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Question 25 of 35

25. Question
How do you find the virtual principle focus of a diverging lens?
- Sketch the rays backwards to where they appear to come from
- Sketch the rays forwards to where they appear to come from
- Measure the angle each ray makes with the lens
- Measure the focal length
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Question 26 of 35

26. Question
If a lens is made more powerful, what happens to focal length?
- Focal length decreases
- Focal length is 0
- Focal length increases
- Focal length stays the same
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Question 27 of 35

27. Question
If a lens is made more curved, what happens to its power?
- Its power increases
- Its power decreases
- Its power stays the same
- Its power is 0
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Question 28 of 35

28. Question
What is the image produced by a diverging lens like?
- Virtual, right way up, smaller than the object, same side of the lens
- Real, inverted, same size as the object, other side of the lens
- Virtual, inverted, same size as the object, other side of the lens
- Real, right way up, same size as the object, other side of the lens
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Question 29 of 35

29. Question
What can be used instead of glasses?
- Contact lenses
- Technology eyes
- X-ray samples
- All of these answers
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Question 30 of 35

30. Question
How many types of lenses are there?
- 2
- 3
- 1
- 4
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Question 31 of 35

31. Question
Which of the following is a type of lens?
- Hard
- Long
- Integrated
- Forge
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Question 32 of 35

32. Question
Which of the following is a type of lens?
- Soft
- Short
- Vexed
- Differential
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Question 33 of 35

33. Question
How does colour blindness mostly occur?
- Inherited
- Car accident
- Fall
- Terminal illness
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Question 34 of 35

34. Question
How are people colour blind?
- A lack of receptors
- A lack of eye rays
- A lack of lenses in the eye
- All of these answers
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Question 35 of 35

35. Question
How are people cured of colour blindness?
- They cannot be
- Eye impacts
- Eye transplants
- Glasses
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