What is the position of the image when an object is placed at a distance of 30cm?

the image is formed above principal axis . The image is formed on same side of the object. Explanation:Now since the object is placed on 30 cm . It means the object is placed at 2f because f=15cm .

What is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 30cm?

When an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm, the position of the image is at infinity. The reason being, the image formed by a concave mirror is at infinity when an object is placed at its focus.

At what distance of the lens does the screen have to be placed to see a sharp image?

Thus, to obtain a sharp image of the object the screen should be placed in front of the mirror at a distance of 30 cm from the mirror.

How do you find the distance between an object and an image?

Expert Answer:

1. if u is object-to-mirror distance and v is image-to-mirror distance, then magnification m = -v/u = -2 ……………..(1)
2. Hence, we have , v = 2u …………………..(2)

What will be image distance if an object is placed at a distance of 30 cm from convex lens of focal length of 60 cm?

Image distance, v =? v=60010=60 cm . M=60-30=-2.

When an object O placed at a distance of 20cm in front of a mirror an image of the same size as that of O was formed then what will be its focal length?

∴ The image will be formed in front of the concave mirror at a distance of 20 cm. The negative signs shows that the image is real. Hence the ration of the of the image of the size of the object is 1 : 1 .

What is the relation between object distance image distance and focal length?

Object distance means what is the distance between pole and object. Image distance means when image is formed then the distance between pole and image is called image distance. Focal length is the distance between pole and the principal focus of the mirror.

What is focal length of spherical lens?

Focal length of a spherical lens is the distance between optical centre and focus of the lens. The Focal length of a lens is half of its radius of curvature.

When the object is brought closer from infinity towards a convex lens the image size?

As the object is brought closer from infinity towards the convex lens, the size of image increases. When the object is at infinity, point-sized image is formed, while object at focus gives highly enlarged image.

How do you find the distance between two objects?

Learn how to find the distance between two points by using the distance formula, which is an application of the Pythagorean theorem. We can rewrite the Pythagorean theorem as d=√((x_2-x_1)²+(y_2-y_1)²) to find the distance between any two points.

What is the distance between an object and the screen?

The distance between an object and the screen is 90 cm. Where do you have to place a lens 20 cm in focal length to get a sharp image of a point object? – Quora The distance between an object and the screen is 90 cm. Where do you have to place a lens 20 cm in focal length to get a sharp image of a point object? Back to school with Grammarly.

How do you measure the focal length of a lens?

The position at which the lens is fixed, mark it as O. Once the focal length is calculated, mark point F on both the sides of the lens. Mark a point 2F, as the distance between the lens is double the focal length of the lens. Place the candle at a distance beyond 2F and adjust the height of the centre of the lens with the height of the flame.

What is the focal length of a magnified inverted image?

A magnified, inverted image is located a distance of 32.0 cm from a concave mirror with a focal length of 12.0 cm. Determine the object distance and tell whether the image is real or virtual.

Where is the object in front of the focal point?

The results of this calculation agree with the principles discussed earlier in this lesson. In this case, the object is located in front of the focal point (i.e., the object distance is less than the focal length), and the image is located behind the mirror.