True-False Questions. Circle the correct response. T F 1. Infrared wavelengths a

Question

True-False Questions. Circle the correct response.

T          F          1. Infrared wavelengths are shorter than ultraviolet wavelengths.

T          F          2. Visible wavelengths are shorter than infrared wavelengths.

T          F          3. Photons of ultraviolet light have higher energies than photons of infrared light.

T          F          4. Light with a wavelength of 650 nm is blue in color.

T          F          5. An atomic spectrum is a discrete spectrum.

T          F          6. In a hydrogen atom, if a photon makes the transition from the 5th energy level to the 1st energy level, a photon of ultraviolet light is emitted.

T          F          7. In a hydrogen atom, if a photon makes the transition from the 6th energy level to the 4th energy level, a photon of visible light is emitted.

Explanation / Answer

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1) The infrared wavelengths are shorter than ultraviolet wavelengths - FALSE

Infrared wavelength lies in the range of 1 um - 10 um whereas ultraviolet wavelength lies in the range of nm

2) Visible wavelengths are shorter than infrared wavelengths - TRUE

The visible wavelength varies from the region between near ultraviolet to near infrared, hence the given statement is true

3) Since the wavelength is higher in the case of infrared, it will have lesser energy since energy is inversely proportional to wavelength

Therefore, the statement is TRUE

4) The blue light has the wavelength equal to 475-500nm, the red light has the wavelength equal to 650 nm, hence the given statement is FALSE

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