Physics Quiz: EM Waves, Mirrors, Lenses, and Color

What is the primary difference between radio waves and X-rays in the electromagnetic spectrum?

• Radio waves have longer wavelengths and lower frequencies

• X-rays have longer wavelengths and lower frequencies

• Radio waves have shorter wavelengths and higher frequencies

• X-rays have shorter wavelengths and higher frequencies

What type of mirror is commonly used by dental surgeons for focusing light?

• Magnifying mirror

• Convex mirror

• Concave mirror

• Plane mirror

In the human eye, which part controls how much light enters it?

• Pupil

• Retina

• Cornea

• Lens

What is the near point of a normal eye?

• 10 cm

• 25 cm

• 50 cm

• 100 cm

What is the purpose of using colored filters in the activity involving flashlights?

• To create a rainbow effect

• To focus the light beam

• To change the color of the light

• To block the light completely

What type of lenses are used to correct eye defect problems?

• Convex lenses

• Cylindrical lenses

• Bifocal lenses

• Concave lenses

What happens to the image on the screen if half of the convex lens is covered with a piece of card?

• The image disappears

• The image remains the same

• The image becomes dimmer

• The image becomes brighter

What is the primary function of optical instruments?

• To generate light

• To create illusions

• To aid vision

• To measure distances

What colors do you see coming from the flashlight?

• Yellow, magenta, cyan

• Black, white, gray

• Orange, purple, turquoise

• Red, green, blue

What determines the stability of the atomic nucleus?

• Number of photons

• Number of neutrons

• Number of protons

• Number of electrons