OPTICS ( REFLECTION & REFRACTION)

What is the definition of reflection?

• The bending of light when it enters a new medium
• The bending of light when it leaves a medium
• The bouncing of light off a surface
• The absorption of light by a surface

What is the definition of refraction?

• The bending of light when it enters a new medium
• The bending of light when it leaves a medium
• The bouncing of light off a surface
• The absorption of light by a surface

What happens when light passes through a convex lens?

• The light is spread out
• The light is focused into a single point
• The light is bent away from the center of the lens
• The light is bent towards the center of the lens

What happens when light passes through a concave lens?

• The light is spread out
• The light is focused into a single point
• The light is bent away from the center of the lens
• The light is bent towards the center of the lens

What is the critical angle?

• The angle at which light is completely reflected off a surface
• The angle at which light is completely absorbed by a surface
• The angle at which light is completely refracted
• The angle at which light is completely transmitted through a surface

Why do we see a mirage in the desert?

• Because of reflection
• Because of absorption
• Because of refraction
• Because of transmission

What is the relationship between the angle of incidence and the angle of reflection?

• The angle of incidence is equal to the angle of reflection
• The angle of incidence is greater than the angle of reflection
• The angle of incidence is less than the angle of reflection
• There is no relationship between the angle of incidence and the angle of reflection

Why do objects appear different when viewed through a curved lens?

• Because of reflection
• Because of absorption
• Because of refraction
• Because of transmission

What is the difference between a convex and concave lens?

• A convex lens spreads out light and a concave lens focuses light
• A convex lens focuses light and a concave lens spreads out light
• A convex lens bends light towards the center and a concave lens bends light away from the center
• A convex lens bends light away from the center and a concave lens bends light towards the center

What is the purpose of using a lens in eyeglasses?

• To spread out light
• To focus light
• To bend light away from the center
• To bend light towards the center