Convex lenses and where images form
Grade 11 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
Use the sign rule on the sheet. A magnifying glass has f = 10 cm, and a stamp sits 6 cm from it. What is di, Ari?
Use the sign rule on the sheet. A magnifying glass has f = 20 cm, and a stamp sits 12 cm from it. What is di, Bo?
Use the sign rule on the sheet. A magnifying glass has f = 12 cm, and a stamp sits 8 cm from it. What is di, Esme?
A lens makes a same-size real image when the object and image are each 40 cm away. What is f, Kira?
- 20 cm
- 40 cm
- 80 cm
An object 12 cm from a lens gives a sharp image 60 cm away. What is the focal length, Luz?
- 48 cm
- 10 cm
- 72 cm
Milo says a real image made by one convex lens is upright. Agree or disagree?
- Disagree: it is upside down
- Agree: real images match the object
- Agree: lenses keep things the right way up
Noah says the image on a camera's sensor is the right way up. Agree or disagree?
- Disagree: it is inverted on the sensor
- Agree: real images are upright on the sensor
- Agree: the image is virtual
To use a lens as a magnifier, where must the object be placed, Ren?
- Exactly at twice the focal length
- Closer to the lens than its focal length
- Far beyond the focal point
A projector's image is too small on the screen. How should the slide be moved, Tala?
- Inside the focal length
- Closer to the focal point, with the screen moved back
- Farther from the lens
A camera focuses on mountains far away. About where must its sensor sit, Zee?
- At twice the focal length
- At about one focal length behind the lens
- Right against the lens