A diverging lens with magnitude of focal length $25\, cm$ is placed at a distance of $15\, cm$ from a converging lens of magnitude of focal length $20\, cm$. A beam of parallel light falls on the diverging lens. The final image formed is :
- real and at a distance of 40 cm from convergent lens
- virtual and at a distance of 40 cm from convergent lens
- real and at a distance of 40 cm from the divergent lens
- real and at a distance of 6 cm from the convergent lens
The Correct Option is A
Solution and Explanation
$u = -40$ cm which is equal to $2f$
$\therefore$ Image will be real and at a distance of 40 cm from convergent lens.
Top Questions on Ray optics and optical instruments
- What is the focal length of a lens if its power is \( +2 \, \text{D} \)?
- VITEEE - 2025
- Physics
- Ray optics and optical instruments
- A convex lens has a focal length of 10 cm. What is the magnification produced when the object is placed 30 cm from the lens?
- VITEEE - 2025
- Physics
- Ray optics and optical instruments
- A convex lens has focal length 20 cm. An object is placed at a distance of 40 cm from the lens. What is the position of the image formed?
- BITSAT - 2025
- Physics
- Ray optics and optical instruments
- Find the focal length of a lens in a compound lens system.
- BITSAT - 2025
- Physics
- Ray optics and optical instruments
- A radio wave travels in a medium with refractive index 1.5. What is the speed of light in this medium if the speed of light in vacuum is \(3 \times 10^8 \, \text{m/s}\)?
- BITSAT - 2025
- Physics
- Ray optics and optical instruments
Questions Asked in JEE Main exam
The least acidic compound, among the following is
- JEE Main - 2025
- Organic Chemistry
Choose the correct set of reagents for the following conversion:
- JEE Main - 2025
- Organic Chemistry
- JEE Main - 2025
- Organic Chemistry
- In a group of 3 girls and 4 boys, there are two boys \( B_1 \) and \( B_2 \). The number of ways in which these girls and boys can stand in a queue such that all the girls stand together, all the boys stand together, but \( B_1 \) and \( B_2 \) are not adjacent to each other, is:
- JEE Main - 2025
- Permutations
A bead of mass \( m \) slides without friction on the wall of a vertical circular hoop of radius \( R \) as shown in figure. The bead moves under the combined action of gravity and a massless spring \( k \) attached to the bottom of the hoop. The equilibrium length of the spring is \( R \). If the bead is released from the top of the hoop with (negligible) zero initial speed, the velocity of the bead, when the length of spring becomes \( R \), would be (spring constant is \( k \), \( g \) is acceleration due to gravity):
- JEE Main - 2025
- Fluid Mechanics
Concepts Used:
Ray Optics and Optical Instruments
Optics, deals with the determination of behaviour and the properties of light, along with its interactions with the matter and also with the instruments that are used to detect it.
Ray optics is also known as the geometrical optics and it is a branch of science which describes light propagation.
Reflection is the change in direction of light at an interface in-between two different media so that the wave-front returns into a medium from which it was originated.
Speed of light is the rate at which the light travels in free space.
A phenomenal change in image formed when the light is passed from one medium to another which is called Refraction.
Total Internal Reflection is the reflection of light when the light ray enters into a rarer medium from a denser medium and the angle of incidence is higher than the critical angle of incidence then that light ray will be reflected back to the denser medium.
Read More: Ray Optics and Optical Instruments