Electromagnetic Spectrum

What is the range of wavelengths for visible light?

• 100 to 500 nanometers

• 380 to 740 nanometers

• 200 to 800 nanometers

• 600 to 900 nanometers

Which subtopic of the electromagnetic spectrum is used in TV and radio broadcasting?

• Radio waves

• Ultraviolet waves

• X-rays

• Gamma rays

What is the main source of infrared radiation?

• Ultraviolet radiation from the sun

• Visible light from the moon

• Sound waves

• Heat or thermal energy emitted by objects

What are the potential dangers of prolonged exposure to ultraviolet radiation?

• Enhanced skin health

• Decreased risk of skin cancer

• Reduced risk of premature aging

• Skin damage, premature aging, and increased risk of skin cancer.

How are microwaves used in everyday life?

• Microwaves are used for drying clothes quickly

• Microwaves are used for watering plants

• Microwaves are used for charging electronic devices

• Microwaves are used for quickly heating food, defrosting frozen items, and cooking meals in a convenient and efficient manner.

What is the primary difference between radio waves and microwaves?

• The primary difference is in their color and brightness.

• The primary difference is in their weight and volume.

• The primary difference is in their taste and smell.

• The primary difference is in their frequency and wavelength.

What are the uses of X-rays in the medical field?

• X-rays are used for imaging bones, detecting fractures, tumors, and other abnormalities, as well as in medical procedures like angiography and radiation therapy.

• X-rays are used for performing heart surgeries

• X-rays are used for delivering chemotherapy

• X-rays are used for dental cleanings and fillings

What is the relationship between frequency and wavelength in the electromagnetic spectrum?

• No relationship

• Random relationship

• Direct relationship

• Inverse relationship

How does the human eye perceive different colors of visible light?

• By absorbing light through the hair follicles

• By using the sense of smell

• Through the skin's receptors

• Through specialized cells called cones in the retina

What are the similarities and differences between ultraviolet radiation and X-rays?

• Ultraviolet radiation and X-rays are both visible to the human eye

• Ultraviolet radiation and X-rays have the same wavelength

• Ultraviolet radiation and X-rays have the same level of energy

• Ultraviolet radiation and X-rays are both forms of electromagnetic radiation with high energy, but they differ in wavelength and energy level.