Physics Quiz

What does the term "emission" refer to in the context of physics?

• The absorption of energy

• The reflection of light

• The act of discharging energy, light, particles, and different types of waves

• The conversion of electrical energy into mechanical energy

What is the wavelength of the H-alpha line in the hydrogen emission spectrum?

• 400 nm

• 656 nm

• 700 nm

• 550 nm

What does the transition from N=3 to N=2 in the hydrogen atom represent?

• Absorption of energy

• Emission of a photon

• No change in energy

• Ionization of the hydrogen atom

What is the range of wavelengths shown in the hydrogen emission spectrum diagram?

• 400 nm to 700 nm

• 300 nm to 600 nm

• 500 nm to 800 nm

• 600 nm to 900 nm

Why do electrons emit specific wavelengths of electromagnetic radiation?

• They absorb energy

• They move to a higher energy state

• They return to a lower and more stable energy state

• They remain in a constant energy state

What does the symbol "ΔG" represent in the context of the energy state diagram?

• Activation energy required to start a reaction

• Total energy absorbed by the reaction

• Change in free energy between reactants and products

• Energy released as heat during the reaction

What is the significance of the peak in the energy state diagram labeled "E_a"?

• It represents the maximum energy level of the products.

• It indicates the minimum energy required to initiate the reaction.

• It shows the energy level where reactants are most stable.

• It marks the point at which all reactants are converted to products.

What is the function of a spectroscope as described in the image?

• To measure the intensity of light in a room.

• To observe distant celestial bodies.

• To measure the properties of different wavelengths of electromagnetic radiation from a single source.

• To increase the visibility of microscopic organisms.

What is the typical wavelength range for visible light in the electromagnetic spectrum?

• 400 nm to 700 nm

• 10 nm to 400 nm

• 1 cm to 1 m

• 0.01 nm to 10 nm

Which type of electromagnetic radiation has a shorter wavelength than visible light?

• Radio waves

• Infrared

• Ultraviolet (UV)

• FM waves