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SO — SoomaaliEN — English

A pinhole camera

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Lesson details

Lesson outcome

Waxaan sharxi karaa sida iftiinka u dhex maro godka yar si uu u soo saaro sawir kamarada godka yar.

Introduction

In this lesson: I can explain how light passes through a pinhole to produce an image in a pinhole camera. A pinhole camera is an empty, closed box with a tiny hole on the front face and a screen on the back face. Light moves in straight lines from a light source, through the pinhole, to the screen at the back of a pinhole camera.

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A pinhole camera is an empty, closed box with a tiny hole on the front face and a screen on the back face. Light moves in straight lines from a light source, through the pinhole, to the screen at the back of a pinhole camera. Light from each different point on the object falls on a different single point on the screen, forming the image. The image produced by a pinhole camera is dim and inverted. Adding more holes produces multiple images. Making the hole larger makes the image brighter but blurred. More light passes through the hole in more directions.

Worksheet

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Quizzes

  1. 1. Which of the following is a definition of a translucent material?

    • It lets no light through.
    • It lets light through and you can see clearly through it.
    • It lets light through and changes the colour of the light.
    • Correct answer:It lets some light through, but you cannot see clearly through it.

  2. 2. Which of the following describes a luminous object?

    • Correct answer:an object that emits light
    • an object that scatters light
    • an object that absorbs light
    • an object that reflects light the way a mirror does

  3. 3. In diagrams, we can draw arrows to show the direction light travels, and where the light travels from and to. What are these arrows called?

    • laser beams
    • light arrows
    • light beams
    • Correct answer:light rays

  4. 4. Which of the following is a definition of the word ‘image’?

    • a real object
    • an imaginary object
    • Correct answer:a representation of a real object
    • a representation of an imaginary object

  5. 5. Which of the following statements is always necessary for you to be able to see an object?

    • The object must be luminous.
    • Light from the surroundings must hit the object.
    • Light coming from your eyes must enter the object.
    • Correct answer:Light coming from the object must enter your eyes.

  6. 6. Which of the following statements explains why it is easier to see a dim lamp outdoors at night than in the day?

    • The lamp’s light and the daylight cancel each other out.
    • The lamp produces more light when its surroundings are dark.
    • Correct answer:There is more contrast between the lamp and its surroundings at night.
    • More of the lamp’s light is absorbed by the surroundings during the day.

  1. 1. Which of the following key terms means ‘turned upside–down’?

    • converted
    • diverted
    • Correct answer:inverted
    • reverted

  2. 2. A ball moves through the air in daylight. The ball is not shiny and it is not black. Which of the following statements is correct?

    • Every point on the ball’s surface emits light.
    • Correct answer:Every point on the ball’s surface reflects light.
    • Light from each point on the ball’s surface travels straight outwards.
    • Correct answer:Light from each point on the ball’s surface travels in many directions.

  3. 3. Which of the following are needed for a pinhole camera to show a clear image?

    • a lens
    • Correct answer:a translucent screen at the back of the camera
    • a translucent screen at the front of the camera
    • Correct answer:an object to look at that is very bright
    • an object to look at that may or may not be very bright

  4. 4. A pupil makes a pinhole camera and uses it to make an image of a bulb. Then the pupil makes the pinhole larger. In which of the following ways does this change the image?

    • it gets larger
    • it gets smaller
    • it becomes clearer
    • Correct answer:it becomes more blurred

  5. 5. A pinhole camera makes an image of a filament bulb. Which of the following changes will make the image smaller?

    • moving the camera closer to the bulb
    • Correct answer:moving the camera further from the bulb
    • using a longer box for the pinhole camera
    • Correct answer:using a shorter box for the pinhole camera

  6. 6. A pupil holds up a pinhole camera at a short distance from a filament bulb that is switched on. Which of the following statements explains why an image of the bulb appears on the screen?

    • An image of the bulb fits through the pinhole and lands on the screen.
    • The pinhole changes the directions of rays so that they make an image.
    • Each point on the screen is hit by light from every point on the bulb.
    • Correct answer:Each point on the screen is hit by light from only one point on the bulb.

What pupils see

The same lesson as a pupil sees it. You can set any section as work on its own.

  • IntroductionPrepare
  • Starter quizActivate · 6 questions
  • Lesson videoLearn
  • Exit quizCheck · 6 questions
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