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 30 cm?
Solution. 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.
What is the position of the image when an object is placed at a distance of 30 cm from a concave mirror of focal length 20cm?
Answer. the image will be formed between f and c , real and inverted , same size of the object.
Where is the image located If an object is 30 m in front of convex mirror with a focal length of 20 cm?
Answer. The final answer would be negative since, the image type would be virtual. The sign of of the value of the focal length was changed to negative (-) since the mirror used was a CONVEX mirror. The location of the image is between the focal point(F) and the vertex(V).
Where must an object 2cm tall be placed in front of a concave mirror 30 curvature 30cm if a real image 4 cm is obtained?
An object is placed 2 cm in front of a concave mirror whose radius of curvature is 30 cm. This means that the object is well inside the mirrors focal length (15 cm). So your image will be virtual, not real.
What is the chief difference between real and virtual images?
Real images are produced by intersecting rays while virtual images are produced by diverging rays. Real images can be projected on a screen while virtual ones cannot. Real images are formed by two opposite lens, concave and convex. Virtual images are always upright while real images are always inverted.
What are the similarities and differences between a real and virtual image?
Comparison Chart
| Basis for Comparison | Real Image | Virtual Image |
|---|---|---|
| Image reception | Image can be appeared on a screen. | Image appears to be on the mirror or lens itself. |
| Interaction of light rays | Actual | Imaginary |
| Appearance of image | Inverted | Erect |
| Formed by | Concave mirror and convex lens. | Plane, convex mirror and concave lens. |