f = 15 cm .
What is the focal length of a convex mirror whose radius of curvature is 36 cm?
hence the focal length is 18 cm .
What is the focal length of a convex mirror whose radius of curvature is 32 cm?
Find the focal length of a convex mirror whose radius of curvature is 32 cm. The focal length of a spherical mirror
What is the focal length of a convex mirror whose radius of curvature is 40 cm?
ANSWER: The focal length of convex mirror with radius of curvature as 40 cm is 20 cm .
Why do we prefer a convex mirror whose radius of curvature is 32 cm?
Convex mirror can cover a wider range and give erect and diminished image . Hence convex mirror is used as a rear-view mirror to get wider field of view. Q5. Find the focal length of a convex mirror whose radius of curvature is 32 cm.
What is the focal length of a convex mirror whose?
The focal length of a spherical mirror is equal to half the radius of curvature of that mirror. Hence, the focal length of the given convex mirror is 16 cm .
How can you find the focal length of a convex mirror?
You can measure the radius of curvature (R) of the mirror by measuring the distance between convex mirror and the screen placed behind the mirror. You can calculate the focal length of the mirror using the equation f = R/2 .
What is the focal length of a convex mirror whose radius of curvature is 28 cm?
the focal length of the convex mirror is equal to half of the radius of curvature of that mirror.
What is focal length of lens whose radius of curvature is 30cm?
Hence, the focal length of the given convex mirror is 16 cm .
What is the focal length of a concave mirror of radius of curvature 16.0 cm *?
Answer: 32cm is the answer.
What is the focal length of a concave mirror whose radius is 40 cm answer in CM?
The correct answer is 20 cm . Given that, Radius of curvature= 40 cm.
How do you find the focal length of a concave mirror?
By obtaining the Real image of a distant object at its focus, the focal length of the concave mirror can be estimated as shown in the diagram. The focal length of the convex mirror is positive, whereas that of the concave mirror is negative. The same can also be proved by using the mirror formula: (1/f = 1/v +1/u) .
What is focal length class 10?
The distance between the convex lens or a concave mirror and the focal point of a lens or mirror is called the focal length. It is the point where parallel rays of light meet or converge .
What is the focal length of a convex mirror of radius of curvature 2 m?
The answer is 0.5 m . Explanation: Focal length is the distance between the center of a lens and a convex or concave mirror. Focal length converges or diverges the light.
Where is the focal point of a convex mirror whose radius of curvature is R?
| f ≈ r | 2 |
|---|
What is the focal length of a concave mirror whose radius of curvature is 20 cm?
The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Therefore, the focal length of the spherical mirror is 10 cm .
Is the focal length of a convex mirror is 25 cm What is its radius of curvature?
If f =25 cm, radius of curvature (r) = 2f = 50 cm .
What is the formula of focal length of convex lens?
The focal length of a thick lens in air can be calculated from the lensmaker’s equation: P=1f=(n−1)[1R1−1R2+(n−1)dnR1R2] P = 1 f = ( n − 1 ) [ 1 R 1 − 1 R 2 + ( n − 1 ) d n R 1 R 2 ] . The signs of the lens’ radii of curvature indicate whether the corresponding surfaces are convex or concave.
What will be the focal length of a convex mirror if its radius of curvature is 18 cm?
36cm ‘ is the correct answer.
What is the formula of convex mirror?
1/f= 1/u + 1/v . This equation is referred to as the mirror formula. The formula holds for both concave and convex mirrors.
How do you find the focal length of a convex mirror using a convex lens?
The focal length of a convex mirror can be determined by introducing a convex lens between the object and the convex mirror . An image can be obtained with the help of a convex lens side by side with the object when the convex mirror reflects the rays along the same path, i.e., when the rays fall normally on the mirror.
What will be the focal length of a convex mirror with radius of curvature 50 cm?
From R=2f=2×50= 100cm .
What is the focal length of the plane mirror?
However the focal length of a plane mirror is infinity ; its optical power is zero.
How do you find the focal length?
The focal length of a double convex lens is given by the formula (1/v) + (1/u) = (1/f) , where u is the distance between the object and the lens, v is the distance between the image and the lens.
What is the focal length of a concave mirror whose radius of curvature is 30 cm?
The radius of curvature of a concave mirror is 30 cm what is its focal length? The focal length of a concave mirror is 10 cm .
What is the focal focus length in a concave mirror with radius 30 cm?
Therefore focal length is equal to (-15cm) .
What is the distance between pole and principal focus?
Focal length – The distance between focus and pole is focal length.
How do you find the focal length from the radius of curvature?
Focal Length of a Curved Mirror
A mirror with a curvature radius R of the surface has a focal length f = R / 2 , if the beam axis is normal to the mirror surface.
What is focal length 7th class?
The distance between the convex lens or a concave mirror and the focal point of a lens or mirror is called the focal length. It is the point where parallel rays of light meet or converge . The focal length varies with the sign (positive or negative) depending upon the nature of the lens and mirror(concave or convex).
Which type of image is formed by a convex mirror?
Image formed by a convex mirror is always virtual and erect . When an object is placed at infinity, virtual image is formed at focus and the size of the image is smaller.
What is the formula for mirror?
Let’s explore the mirror formula (1/f = 1/v+1/u) and see how to locate images without drawing any ray diagrams.
Is focal length of convex mirror positive?
Focal length is positive for a convex mirror and negative for concave mirror.
How do you find the focal length of a concave mirror when radius of curvature is given?
The focal length of a spherical concave mirror is given as $f=dfrac{R}{2}$ , where R is the radius of curvature of the mirror. It is given that $R=24cm$.
How do you find the radius of a concave mirror?
R=CF+FP . In other words, in the small-angle approximation, the focal length f of a concave spherical mirror is half of its radius of curvature, R: f=R2.
What is the radius of curvature of the concave mirror when its focal length is 3 units?
⇒ Radius of Curvature (R) = 2f ⇒ R = 2*(-K/6) or R = -K/3 unit . Therefore the Radius of Curvature (R) of Concave Mirror is K/3 unit.
How can you determine the focal length of a convex lens and concave mirror by simple methods?
To determine focal length of a convex lens
Place the holder with the screen on the bench . The position of the screen should be such that the sharp image of the distant object is obtained on it. The difference between the position of the lens and the screen is equal to the focal length of the given convex lens.
What is the focal length of convex mirror positive or negative?
The focal length and power of a convex mirror are negative , since it is a diverging mirror. Figure 3.
Is the focal length of a convex lens negative?
The focal length of a concave surface is negative , whereas the focal length of a convex surface is positive. Therefore, for a lens, the power of a concave and convex lens is negative and positive respectively.
What is the focal length of convex mirror whose radius of curvature is 100 cm?
Answer: Hence, the focal length of the given spherical mirror is 50cm .
