Physics
For a real image formed by a convex lens, the ratio of I : O = 2 : 5, then the object is :
(I is the height of the image and O is the height of the object)
- between O and F
- beyond 2F
- at F
- between F and 2F
Related Questions
Which one of the following combinations is the correct ascending order of electromagnetic waves in terms of wavelength?
- Gamma-rays, visible light, microwaves
- Microwaves, visible light, gamma-rays
- Gamma-rays, microwaves, visible light
- Microwaves, gamma-rays, visible light
A ray of light is incident normally on a face of an equilateral prism. The ray gets totally reflected at the second refracting surface. The total deviation produced in the path of the ray is:
- 30°
- 60°
- 90°
- 120°
In a closed circuit containing a bulb and a cell, the electromotive force (ε) and the terminal voltage (V) is related as.
(Given I is current and r is internal resistance.)
- V = ε + Ir
- V = ε – Ir
- V = ε ÷ Ir
- V = ε × Ir