Last updated on February 9th, 2024 at 04:28 pm
Q: The picture formed on the screen at the theatre hall is real or virtual?
The picture formed on the screen in a theatre hall is a real image. This is because the light from the actors or objects on the stage converges to a point on the screen, and it can be captured on a physical screen or projection surface. Real images can be projected onto a screen and can be seen by the audience.
Q: What is the minimum distance at which a clear image can be visualized?
The minimum distance at which a clear image can be visualized is typically around 25 centimeters (or 10 inches).
Q: Where is the image formed in a human eye?
The image is formed in the retina of the human eye.
Q: What is shortsightedness ? How can it be rectified?
Shortsightedness, also known as myopia, is a vision condition in which a person can see objects up close clearly, but distant objects appear blurred. Myopia can be rectified by using concave (diverging) lenses.
Q: What do you understand by longsightedness ? How can this be rectified?
Longsightedness, also known as hypermetropia or hyperopia, is a vision condition in which a person has difficulty seeing nearby objects clearly, but distant objects are seen more clearly. Hypermetropia can be rectified by using convex (converging) lenses.
Q: What do you understand by refraction?
Refraction is the bending of light as it passes from one transparent medium into another, causing a change in its direction due to differences in the speed of light in each medium.
Q: When the light ray enters water medium through glass medium, where will it deflect – towards normal or away from the normal?
When a light ray enters water through glass , it will deflect towards the normal because it goes from a rarer medium to a denser one.
Q: What do you understand by refractive index of a medium?
The refractive index of a medium is a measure of how much the speed of light is reduced when it passes through that medium compared to its speed in a vacuum.
