What is focal length of concave mirror if the radius of curvature is 20cm?
10 cm
So, focal length = 21× radius of curvature = 21×20 cm = 10 cm.
What would be the focal length of a mirror with radius of curvature 20 cm?
UPLOAD PHOTO AND GET THE ANSWER NOW! Solution : Radius of curvature, R = 20 cm. Radius of curvature of a spherical mirror = 2 x Focal length (f). R = 2f `F=(R )/(2)=(20)/(2)=10 cm` Hence, the focal length of the given spherical mirror is 10 cm.
Where should a person stand in front of a concave mirror of radius of curvature 20cm to get a real image of his own 2 times larger a 80cm B 10cm C 15cm D 30cm?
The person should stand at a distance 20 cm in front of the concave mirror. Therefore option (D) is correct.
When an object is placed 20 cm away from a concave mirror?
When an object is placed 20 cm from a concave mirror, a real image magnified three times is formed.
What is meant by the focal length of a concave mirror is 20cm?
A concave mirror of focal length 20 cm produces an image twice the height of the object.
What is the focal length of curved mirror of radius of curvature is 40 cm 20 cm 35 cm 25 cm 40 cm?
Answer: The focal length of the given spherical mirror is 20cm.
Where should a person stand in front of a concave mirror of radius of curvature 20 cm to get a real image of his own 2 times?
Thus the person should stand at a distance of 10 cm infront of the mirror.
When an object is placed at a distance of 20 cm?
If an object is placed at a distance of 20cm from the pole of a concave mirror, the magnification of its real image is 3. If the object is moved away from the mirror by 10cm, then the magnification is -1.
When an object is placed 20 cm from a concave mirror a real image formed if magnification of the image formed is 3?
Thus, the focal length of the concave mirror is 15 cm. (b) Now, if the image is virtual and 3 times magnified, then we have to find the position of the object. Thus, the object should be placed at a distance of 10 cm to get a virtual image three times the height of the object.
What kind of mirror can have a focal length of 20 cm?
A concave mirror has a focal length of 20 cm.
At what distance from a concave mirror of focal length 20 cm should the object be placed so that a physical image is formed 20 cm from the mirror?
Therefore, the object should be placed at a distance of 20 cm from the mirror to form a real image. To find: Distance of the object, . Therefore, the object should be placed at a distance of 6.6 cm from the mirror to form a virtual image.
What do you mean by focal length of a spherical mirror is 20cm?
The radius of the curvature of the mirror is defined by the radius of the sphere from which the mirror was cut from. Therefore the radius of curvature of a plane mirror is infinite in length. Radius of curvature (R) = 20 cm. Radius of curvature of a spherical mirror = 2 X Focal length (f)
What is the focal length of concave 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.
What is the formula for radius of curvature?
Radius of Curvature Formula R= 1/K, where R is the radius of curvature and K is the curvature.
When an object is placed at a distance of 20cm infront of a concave mirror of focal length 15cm then the image formed by the concave mirror is?
So we can now say that the position of the image will be 60 cm from the mirror.
When an object is placed at a distance of 20cm from a convex mirror?
a) An object is placed at a distance 20 cm from a convex mirror of focal length 15 cm. Find the position, size and nature of image. (Ans. v = +8.57 cm, h = +2.14 cm) 5 0.
When an object is placed at 20 cm from a concave mirror a real image magnified three times is formed find the focal length of the mirror?
When an object is placed at 20 cm from a concave lens of focal length 20 cm Where will the image be formed?
Answer. Answer: Explanation:1/20 +1/q= 1/10 q=20 cm The image is formed behind the lens at 2f or the center …