Define the principal focus of a concave mirror.

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The point on the principal axis of a concave mirror where the rays of light coming from infinity or parallel to the principal axis meet after reflection from the mirror is called the principal focus of a concave mirror.

It is denoted by the symbol F.
The principal focus is also referred to as simply focus or focal point.
The principal focus of a concave mirror lies in front of the mirror.
The distance between the pole and the principal focus of the concave mirror is called the focal length.
A line passing through the principal focus and perpendicular to the principal axis on which the rays of light coming from a distant object making different angles with the principal axis converge or diverge is known as a focal plane.
A concave mirror is also known as a convergent mirror.

Location of principal focus of the concave mirror

Location of principal focus of the concave mirror

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Define the principal focus of a concave mirror.

CBSE X Related Questions

1.
When an element 'X' reacts with water, it starts floating. Identify the element 'X':

2.
A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position of object and position of image will be, respectively :

3.
State two differences between the act of chewing food and salivation on sight of food.

4.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

5.
How many bulbs of resistance \( 8 \ \Omega \) each should be connected in parallel combination to draw a current of \( 2 \text{ A} \) from a battery of \( 4 \text{ V} \) ?

6.
Identify the part that controls the closing and opening of the stomatal pore in leaves of plants. Select the correct option.

Similar Science Concepts

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Define the principal focus of a concave mirror.

CBSE X Related Questions

1.When an element 'X' reacts with water, it starts floating. Identify the element 'X':

2.A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position of object and position of image will be, respectively :

3.State two differences between the act of chewing food and salivation on sight of food.

4.Assertion (A): Reflex actions do not involve thinking. Reason (R): Most reflex actions are controlled by the spinal cord.

5.How many bulbs of resistance \( 8 \ \Omega \) each should be connected in parallel combination to draw a current of \( 2 \text{ A} \) from a battery of \( 4 \text{ V} \) ?

6.Identify the part that controls the closing and opening of the stomatal pore in leaves of plants. Select the correct option.

Similar Science Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
When an element 'X' reacts with water, it starts floating. Identify the element 'X':

2.
A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position of object and position of image will be, respectively :

3.
State two differences between the act of chewing food and salivation on sight of food.

4.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

5.
How many bulbs of resistance \( 8 \ \Omega \) each should be connected in parallel combination to draw a current of \( 2 \text{ A} \) from a battery of \( 4 \text{ V} \) ?

6.
Identify the part that controls the closing and opening of the stomatal pore in leaves of plants. Select the correct option.