- Convex lens image formation depends on object position relative to F (focus) and 2F. - Object between optical centre and F: Image is virtual, erect, magnified, and on the same side as the object.
A pencil is placed upright at a distance of 10 cm from a convex lens of focal length 15 cm. The nature of the image of the pencil will be
Asked in UPSC NDA 1 2016 · Topic: Optics (Thin and Thick Lenses, lens combinations)
More Physics questions
- Match List I with List II and select the correct answer using the code given below the Lists: List I (Disease) A. Hypermetropia B. Presbyopia C. Myopia D. Cataract List II (Remedy) 1. Concave lens 2. Bifocal lens 3. Surgery 4. Convex lens
- The radii of curvature of the faces of a double convex lens are 10 cm and 20 cm. The refractive index of the glass is 1.5. What is the power of this lens (in units of dioptre) ?
- Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is
- The light energy escaping from the Sun can be spread by
- According to the New Cartesian Sign Convention, which one of the following is correct in respect of the formula $\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$, where symbols have their usual meanings?
- What is the magnification produced by a concave lens of focal length 10 cm, when an image is formed at a distance of 5 cm from the lens?
- If the focal length of a convex lens is 50 cm, which one of the following is its power?
- Which one of the following statements regarding lenses is not correct ?
