Uses of light in technology

Front

What is the law of reflection?

Back

The law of reflection states that when light strikes a reflective surface, the angle of incidence is equal to the angle of reflection.

Front

What is a concave lens?

Back

A concave lens is a lens that is thinner in the center than at the edges and diverges light rays that are incident on it.

Front

What is a convex lens?

Back

A convex lens is a lens that is thicker in the center than at the edges and converges light rays that are incident on it.

Front

What is fiber optics?

Back

Fiber optics is a technology that uses thin strands of glass or plastic to transmit light signals over long distances.

Front

What type of mirror is used in makeup mirrors?

Back

Concave mirrors are used in makeup mirrors because they magnify the image.

Front

What is the difference between concave and convex mirrors?

Back

Concave mirrors curve inward and can focus light, while convex mirrors curve outward and diverge light.

Front

What is the purpose of a plane mirror?

Back

A plane mirror reflects light to produce a virtual image that is the same size as the object.

Front

What is total internal reflection?

Back

Total internal reflection occurs when light travels from a denser medium to a less dense medium at an angle greater than the critical angle, causing it to reflect entirely back into the denser medium.

Front

What is the critical angle?

Back

The critical angle is the angle of incidence above which total internal reflection occurs.

Front

How does a laser work?

Back

A laser works by emitting light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.