Physics
Grade-10
Easy
Question
The size of the pupil decreases when ____.
- There is not enough light
- There is enough light
- It is totally dark
- None of the above
Hint:
We can't see in too high or too low light.
The correct answer is: There is enough light
The size of the pupil decreases when there is enough light. This is done to control the amount of light entering the eye.
Related Questions to study
Physics
A person with normal eyes is holding a book at a distance of 20 cm from her eyes and trying to read it. Which of the following is not true about the state of the person?
A person with normal eyes is holding a book at a distance of 20 cm from her eyes and trying to read it. Which of the following is not true about the state of the person?
PhysicsGrade-10
Physics
Which of these parts of the human eye focuses maximum light falling on it?
Which of these parts of the human eye focuses maximum light falling on it?
PhysicsGrade-10
Physics
Which of the following options indicates the function of the part of the human eye shown below?
Which of the following options indicates the function of the part of the human eye shown below?
PhysicsGrade-10
Physics
Which of the following options indicates the function of the part of the human eye shown below?
Which of the following options indicates the function of the part of the human eye shown below?
PhysicsGrade-10
Physics
A tree is located at a distance of 1 km from a person. Which of the following is true about the sight of the person?
i. The person can clearly see the tree as it is located between the near point and the far point.
ii. The person cannot see it clearly as it is away from the far point.
iii. The person will experience stress in his eyes.
A tree is located at a distance of 1 km from a person. Which of the following is true about the sight of the person?
i. The person can clearly see the tree as it is located between the near point and the far point.
ii. The person cannot see it clearly as it is away from the far point.
iii. The person will experience stress in his eyes.
PhysicsGrade-10
Physics
When a person sees an object located nearby, the ciliary muscles _____ which makes the lens _____, _____ the focal length of the lens.
When a person sees an object located nearby, the ciliary muscles _____ which makes the lens _____, _____ the focal length of the lens.
PhysicsGrade-10
Physics
The eye lens forms a _____ image of any object on the retina.
The eye lens forms a _____ image of any object on the retina.
PhysicsGrade-10
Physics
Which of the following shows the correct labeling of the diagram shown below?
Which of the following shows the correct labeling of the diagram shown below?
PhysicsGrade-10
Physics
The information about the image formed at the retina is carried by the optic nerves to the brain in the form of ______.
The information about the image formed at the retina is carried by the optic nerves to the brain in the form of ______.
PhysicsGrade-10
Physics
The ability of the eye lens to change its curvature is called its _____.
The ability of the eye lens to change its curvature is called its _____.
PhysicsGrade-10
Physics
A human eye can see clearly from ____ to ______.
A human eye can see clearly from ____ to ______.
PhysicsGrade-10
Physics
How does the iris control the amount of light entering the eye?
How does the iris control the amount of light entering the eye?
PhysicsGrade-10
Physics
A man wears a pair of spectacles of power +3.5. Which of the following statements is correct about him?
I. He is farsighted.
II. He wears concave lenses
III. The focal length of the lens of his spectacles is positive
IV. His near point is farther than 25 cm from his eyes without lenses
A man wears a pair of spectacles of power +3.5. Which of the following statements is correct about him?
I. He is farsighted.
II. He wears concave lenses
III. The focal length of the lens of his spectacles is positive
IV. His near point is farther than 25 cm from his eyes without lenses
PhysicsGrade-10
Physics
Which of the following parts of the eye focuses most of the light?
Which of the following parts of the eye focuses most of the light?
PhysicsGrade-10
Physics
The size of the pupil increases when ____.
The size of the pupil increases when ____.
PhysicsGrade-10