The Pinhole Camera

Q.

The focal length of the eye lens increases when eye muscles

1. are relaxed and the lens becomes thinner

2. contract and lens becomes thicker

3. are relaxed and the lens becomes thicker

4. contract and lens becomes thinner

Q.

Write advantages and disadvantages of a pinhole camera?

Q. An object 5 cm long and a pencil 10 cm long are placed in front of a pinhole camera such that their images have the same length.Find the ratio of the distances of object from the pinhole to that of the pencil?

Q.

The camera is set in a proper direction by

1. View finder

2. Focussing ring

3. Diaphragm

4. Shutter

Q.

How does a camera works and who invented it when and how?

Q. Which of these eye coat is highly vascularized and deeply pigmented?

1. Retina coat
2. Papillae coat
3. Sclerotic coat
4. Choroid coat

Q.

Consider the following statements:
Statement 1: Cone cells are sensitive to dim light.
Statement 2: Rod cells are sensitive to bright light.

Choose the correct option:

1. Inclined to each other

2. Opposite to the incident rays

3. Parallel to each other

4. Parallel to the incident rays

Q.

Light from an object enters the eye through the pupil and travels to the back of the eye, forming an image on the retina. What is the orientation of the retinal image, as compared to that of the original object?

1. Turned to the left

2. Same direction

3. Turned to the right

4. Upside down

Q.

An image formed by a pinhole camera is______and_______.

1. inverted

2. erect

3. virtual

4. real

Q. Choose the properties of images formed by a pinhole camera.

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

Q. Which of the following objects do not experience any change in the orientation of their image through a pinhole camera?

1. 
2. 
3. 
4. 

Q.

What is the circular opening in the middle of iris known as?

1. Cornea

2. Pupil

3. Retina

4. Lens

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

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

Q. Sort the following things with regard to the order of image formation in a pinhole camera.

1. The pinhole
2. Light rays
3. The source object
4. The screen

Q. The eye can control the amount of light falling on the retina. Which part of the eye is responsible for this?

Q. Which of the following will be the correct image formed through a pinhole camera if the object is as shown below?

1. 
2. 
3. 
4. 

Q. Choose the correct statement(s) regarding a pinhole camera.

1. It does not have a glass lens.
2. The image formed using a pinhole camera is always inverted.
3. It makes use of an extremely small opening.
4. The image formed using a pinhole camera is never inverted.

Q. A student observes the object given in figure through a pinhole camera. Which of the diagrams given in the options depict the image seen by her correctly?

1. 
2. 
3. 
4. 

Q.

What is opened while clicking the camera?

1. View finder

2. Aperture

3. Shutter

4. Diaphragm

Q.

What is the circular opening in the middle of iris known as?

1. Pupil

2. Cornea

3. Lens

4. Retina

Q. The image formed in a pinhole camera is inverted. Why?

1. Light travels at very high speed.
2. Light travels in a straight line.
3. Light can undergo reflection.
4. Light can undergo refraction.

Q. The eye can control the amount of light falling on the retina. Which part of the eye is responsible for this?

Q. The least distance of distinct vision for a young adult with normal vision is:

1. 25 cm
2. 10 cm
3. 25 m
4. 10 m

Q. The eye can control the amount of light falling on the retina. Which part of the eye is responsible for this?

Q. A pinhole camera produces an inverted image.

1. False
2. True

Q. draw all structural , geometrical, and optical isomerism possible for C4H7B

Q. The circular opening in the middle of iris is called:

1. Cornea
2. Pupil
3. Eye lens
4. Retina

Q. The least distance of distinct vision for a young adult with normal vision is:

1. 10 cm
2. 10 m
3. 25 cm
4. 25 m

Q. Who found eye structure

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.