Exploring Optical Instruments

What is the primary function of a lens in optical instruments?

• To magnify objects without altering light direction.

• To create sound waves for audio devices.

• To filter colors from light sources.

• To focus or disperse light to form images.

Which optical instrument is used to magnify small objects?

• Microscope

• Magnifying Glass

• Telescope

• Binoculars

What type of lens is thicker in the center than at the edges?

• Convex lens

• Plano-convex lens

• Bifocal lens

• Concave lens

What is the purpose of a microscope?

• The purpose of a microscope is to magnify small objects for detailed observation.

• To illuminate dark areas in a room.

• To reduce the size of large objects.

• To measure the temperature of small objects.

Which optical device uses mirrors to reflect light?

• Magnifying Glass

• Camera

• Telescope

• Projector

What is the term for the distance from the lens to the focal point?

• Lens distance

• Optical length

• Image distance

• Focal length

What type of optical instrument is a telescope?

• A tool for cutting glass.

• An instrument for recording sound waves.

• A device that measures temperature.

• An optical instrument that gathers and magnifies light.

What is the main difference between a concave and a convex lens?

• Concave lenses have a thicker center than convex lenses.

• Both concave and convex lenses converge light.

• Concave lenses diverge light; convex lenses converge light.

• Concave lenses converge light; convex lenses diverge light.

Which optical instrument is commonly used in classrooms for presentations?

• Slide rule

• Whiteboard

• Overhead projector

• Projector

What is the role of the eyepiece in a microscope?

• The eyepiece focuses light onto the specimen.

• The eyepiece controls the illumination of the sample.

• The eyepiece adjusts the stage height.

• The eyepiece magnifies the image for viewing.