Formation of Image by Pinhole Camera

Q.

What is the image formed by the lens of a camera?

Q. what is the effect on the image in the pin hole camera if the luminous object is moved towards the pin hole ?

Q.

Question 8

You have 3 opaque strips with very small holes of different shapes as shown in Fig. If you obtain an image of the sun on a wall through these holes, will the image formed by these holes be the same or different?

Q.

Question 2

A student observes a tree given in Fig. through a pinhole camera. Which of the diagrams given in Fig. (a) to (d), depicts the image seen by her correctly?

(a)

(b)

(c)

(d)

Q. Which of the following objects would you choose to make the screen of a pinhole camera?

1. 
2. 
3. 

Q.

Summarise the differences between an image formed in a mirror and an image formed in a pinhole camera?

Q. An image formed by a pinhole camera is ______ and _______.

1. real, inverted
2. virtual, inverted
3. real, erect
4. virtual, erect

Q.

The camera is set in a proper direction by _________

Q. What kind of image is obtained in a pinhole camera?

Q. Pinhole camera is a simple application of :

1. reflection of light
2. rectilinear propagation of light
3. refraction of light
4. scattering of light

Q. Why do we not see an upside down image of the sun in a pinhole camera?

1. A pinhole camera can only make point size images.
2. Image of the sun is point size (or highly diminished).
3. Sun is symmetric (spherical) in shape.
4. Pinhole camera forms erect images.

Q. State the characteristics of the image formed by a pinhole camera.

Q.

How can the distance of the lens from the film be changed

Q. State the effect on the image formed by a pinhole camera if the size of the hole is increased.

1. The image becomes blurred
2. The image gets sharper
3. The image completely vanishes
4. No image is formed to begin with

Q. What is the role of aperture in pinhole camera ?

1. Sharpens the image
2. Allows light to enter to form the image
3. Diffracts light passing through it
4. None of these

Q. Why do we use a pinhole camera?

Q. What kind of lens is used in making a pinhole camera ?

1. Convex lens
2. Concave lens
3. Concavo-convex lens
4. No lens is used

Q. Identify the instrument from the given image.

1. Periscope
2. Kaleidoscope
3. Pinhole Camera
4. None of the above

Q. In the pinhole camera, the light rays from the source are moving through the pinhole and incident on the white screen. This is due to :

1. the property of light called "rectilinear propagation of light"
2. the property of light called "interference of light"
3. the property of light called "diffraction"
4. the property of light called "dispersion"

Q. Arun has three opaque strips with very small holes of different shapes. In which of the following strips, the image of the sun obtained on the screen is circular?

1. 
2. 
3. 
4. All will form a circular shaped image.

Q. The given image shows the working of which optical instrument ?

1. Telescope
2. Microscope
3. Pinhole Camera
4. Periscope

Q.

Srikar focussed separately on two objects of different sizes using a photographic camera. He found that the sizes of the images of the two objects, one is kept at a distance of $200m$ and the other at a distance of $2m$ is the same. How did he achieve this? Explain.

Q.

In a pinhole camera, the image of height 6 cm is formed at a distance of 10 cm. If the object is situated at a distance of 5 cm, the height of the object is:

1. 1.5 cm

2. 3 cm

3. 6 cm

4. 2 cm

Q. The pin-hole camera demonstrates how light can form images of objects.

1. True
2. False

Q. What acts as a pinhole in the naturally formed pinhole images of sun ?

1. The twigs and branches of trees
2. The trunk of leafless trees
3. The gaps between the leaves
4. The shadow of birds sitting on the trees

Q. The image formed by a pinhole camera is:

1. Inverted
2. Erect
3. Real
4. Virtual

Q. A pinhole camera produces image because of the propagation of light.

1. curvilinear
2. rectilinear
3. virtual-erect
4. real-inverted

Q. A pinhole camera uses a mirror to form an inverted image.

1. True
2. False

Q.

An image of an object cannot be be captured using a _______________

Q. Which of the following is an example of natural pinhole camera ?

1. Thorns on a stem
2. Pollen grains in flower
3. Holes in a leaf
4. All the above