Exploring Geometrical Optics

What is the law of reflection?

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence is half the angle of reflection.

• The angle of incidence is always greater than the angle of reflection.

• The angle of incidence and reflection are both 90 degrees.

Define refraction and provide an example.

• A rainbow after rain.

• A mirror reflecting an image.

• A pencil appearing shorter in a box.

• An example of refraction is a straw appearing bent in a glass of water.

Explain Snell's Law and its significance in optics.

• Snell's Law describes the relationship between the angles of incidence and refraction when light passes through different media.

• Snell's Law is unrelated to the angles of incidence and refraction.

• Snell's Law states that light cannot pass through any medium.

• Snell's Law only applies to sound waves.

What is total internal reflection?

• Total internal reflection is when light passes through a medium without reflection.

• Total internal reflection is when a wave is completely reflected within a medium at an angle greater than the critical angle.

• Total internal reflection happens at any angle of incidence.

• Total internal reflection occurs only in vacuum.

Describe the difference between concave and convex mirrors.

• Concave mirrors create virtual images; convex mirrors can create real images.

• Concave mirrors diverge light and create virtual images; convex mirrors focus light.

• Concave mirrors reflect light evenly; convex mirrors reflect light unevenly.

• Concave mirrors focus light and create real images; convex mirrors diverge light and create virtual images.

How does the focal length of a lens affect image formation?

• The focal length affects the size, position, and type of image.

• The focal length determines the weight of the lens.

• The focal length only affects the color of the image.

• The focal length has no impact on image clarity.

State the lens formula and explain its components.

• 1/f = v * u

• 1/f = 1/v + 1/u

• f = v + u

• 1/f = 1/u - 1/v

What is the magnification formula for lenses?

• M = v / u or M = h' / h

• M = u / v

• M = 2h' / h

• M = v + u

What is the function of a simple microscope?

• A simple microscope uses multiple lenses to magnify objects.

• A simple microscope is for viewing large objects.

• A simple microscope magnifies small objects with a single convex lens.

• A simple microscope captures images without magnification.

What are the characteristics of a virtual image?

• A virtual image is upright, laterally inverted, cannot be projected, and is formed behind the mirror or lens.

• A virtual image cannot be seen and is formed only in concave mirrors.

• A virtual image is always inverted and can be projected onto a screen.

• A virtual image is formed in front of the mirror or lens and is always smaller than the object.