Physics
Light and Mirrors
458 Questions
Light and mirrors questions cover the principles of reflection, image formation, and mirror magnification. Concepts include the properties of plane mirrors, the uses of concave mirrors in solar devices, and the behavior of light rays. These fundamentals are essential general science topics in major competitive examinations.
Plane mirror propertiesConcave mirror applicationsMirror magnification formulaLight reflection lawsImage formation
Light and Mirrors Questions
Which type of mirror is used as a rearview mirror in vehicles?
-
Concave mirror
-
Convex mirror
-
Plane mirror
-
Parabolic mirror
B
Correct answer
Explanation
Convex mirrors are used as rearview mirrors in vehicles because they provide a wider field of view, allowing drivers to see more of the traffic behind them.
What is the focal length of a plane mirror?
-
Zero
-
Infinite
-
Positive
-
Negative
B
Correct answer
Explanation
A plane mirror has an infinite focal length because it does not converge or diverge light rays.
The size of an object in a perspective drawing depends on its distance from the viewer.
A
Correct answer
Explanation
The size of an object in a perspective drawing depends on its distance from the viewer. This is because objects that are closer to the viewer appear larger than objects that are further away from the viewer.
The shape of an object in a perspective drawing can be distorted by its distance from the viewer.
A
Correct answer
Explanation
The shape of an object in a perspective drawing can be distorted by its distance from the viewer. This is because the shape of an object changes as it gets further away from the viewer.
In some cultures, it is believed that breaking a mirror brings seven years of bad luck. What is the origin of this superstition?
-
Mirrors were once believed to be portals to the spirit world.
-
Breaking a mirror was thought to release evil spirits.
-
Mirrors were seen as symbols of vanity and breaking one was seen as a punishment.
-
Mirrors were considered to be sacred objects and breaking one was seen as a sign of disrespect.
A
Correct answer
Explanation
In ancient times, mirrors were believed to be portals to the spirit world. Breaking a mirror was thought to release evil spirits into the world, which could bring bad luck for seven years.
In some cultures, it is believed that breaking a mirror brings seven years of bad luck. What is the origin of this superstition?
-
Mirrors were once seen as portals to the spirit world.
-
Breaking a mirror was thought to release evil spirits.
-
Mirrors were believed to be sacred objects and breaking one was seen as a sign of disrespect.
-
Breaking a mirror was thought to bring bad luck and misfortune.
A
Correct answer
Explanation
Breaking a mirror is considered to be bad luck in many cultures. This superstition is thought to have originated in ancient times, when mirrors were seen as portals to the spirit world. Breaking a mirror was thought to release evil spirits into the world, which could bring bad luck for seven years.
What does Auden mean when he says that the shield is "a mirror to the sun"?
-
The shield reflects the light of the sun.
-
The shield is as bright as the sun.
-
The shield is a symbol of the sun.
-
The shield is a reflection of the world.
D
Correct answer
Explanation
Auden means that the shield is a reflection of the world, as it shows the various aspects of human life, both good and bad.
What does Auden mean when he says that the shield is "a mirror to the sky"?
-
The shield reflects the light of the sky.
-
The shield is as blue as the sky.
-
The shield is a symbol of the sky.
-
The shield is a reflection of the heavens.
D
Correct answer
Explanation
Auden means that the shield is a reflection of the heavens, as it shows the various aspects of human life that occur in the sky, such as the weather, the stars, and the planets.