Class-7 Reflection and Mirrors Quiz

A scientist wants to design an "invisible mirror tunnel" where light enters and bounces infinitely. What must be the arrangement of mirrors to achieve this effect?

• Place two mirrors parallel to each other facing inward.

• Place mirrors at random angles to scatter light.

• Use only one mirror and keep increasing the angle of incidence.

• Use rough-textured mirrors to trap the light inside.

A car manufacturer wants to develop a new rear-view mirror system that shows a wider field of view. What modification should they make to the mirror?

• Use a perfectly flat mirror to maintain clarity.

• Use a convex mirror to increase the field of view.

• Use a concave mirror to bring distant objects closer.

• Use a one-way mirror so light only travels in one direction.

What can you conclude if the angle of incidence of a light ray is 40°, but the reflected ray is measured as 35°?

• The surface is perfectly smooth, and this follows the law of reflection.

• The surface might be rough, or a measurement error occurred

• The mirror absorbed some of the light, changing the angle.

• The light bent because the mirror was tilted incorrectly.

A student sets up an experiment where they shine a laser at a mirror at 30° incidence, but they measure the reflected ray at 50°. What is the MOST LIKELY mistake in their experiment?

• They placed the normal line incorrectly.

• They measured the reflected angle from the wrong side.

• The mirror surface was too reflective, affecting the measurement.

• They used a flashlight instead of a laser, so the reflection scattered.

Engineers designing solar panel farms tilt the panels at a specific angle. Why?

• To prevent excessive light reflection, which reduces energy absorption.

• To maximize the reflection of sunlight into the sky.

• To ensure that light reflects multiple times before absorption.

• To increase the diffusion of light across the surface.

Road reflectors (cat's eyes) shine bright at night when car headlights hit them. What property of light is responsible for this effect?

• Diffused Reflection

• Regular Reflection

• Multiple Refraction

• Total Internal Reflection

If you place a small object between two mirrors at a 90° angle, how many reflections will you see?

• 2

• 3

• 4

• Infinite

Magicians use angled mirrors to create illusions where objects appear or disappear. How is this possible?

• The mirrors scatter the light, making the object appear blurry.

• The light rays are redirected away from the observer's eyes.

• The reflection happens faster than the eye can detect.

• The mirrors absorb the light, making the object disappear.

You are designing a smart home lighting system that automatically directs sunlight into dark corners of a room. Which type of mirror would be best suited for this job?

• Flat mirrors placed at an angle to reflect sunlight directly.

• Convex mirrors to spread light across the entire room.

• Concave mirrors to concentrate light in one spot.

• Tinted mirrors to reduce the brightness of the reflected light.

Scientists are developing a solar-powered car that uses reflection to charge itself while moving. How might reflection be used in this innovation?

• By using reflective surfaces to concentrate sunlight onto the solar panels.

• By minimizing reflections so that all light is absorbed.

• By making the mirrors rough so they scatter light in different directions.

• By using mirrors to bend light away from the solar panels to reduce overheating.