Which statement is NOT true regarding an interference filter?

Which statement is NOT true regarding an interference filter?

• A. It is highly sensitive
• B. It is considered to have a high half-height bandwidth
• C. Transmits a single wavelength
• D. It is considered to have a low half-height bandwidth

Answer: (B)

An interference filter is designed to selectively transmit specific wavelengths of light while reflecting others through constructive and destructive interference. The statement that a typical interference filter is considered to have a high half-height bandwidth is not true. Interference filters generally feature a low half-height bandwidth due to their precise design and ability to transmit narrow bands of wavelengths. This means that they are very effective in filtering out all but a small range of wavelengths, making them highly selective. The low half-height bandwidth indicates that they will transmit a very narrow range of light around a central wavelength, which is a key characteristic of interference filters. The sensitivity of these filters is a result of their sharp tuning to specific wavelengths, but they do not exhibit a high half-height bandwidth. The other characteristics associated with interference filters would typically refer to their sensitivity and the idea that they transmit specific wavelengths, which aligns with their functionality in optical applications.

An interference filter is designed to selectively transmit specific wavelengths of light while reflecting others through constructive and destructive interference. The statement that a typical interference filter is considered to have a high half-height bandwidth is not true.

Interference filters generally feature a low half-height bandwidth due to their precise design and ability to transmit narrow bands of wavelengths. This means that they are very effective in filtering out all but a small range of wavelengths, making them highly selective. The low half-height bandwidth indicates that they will transmit a very narrow range of light around a central wavelength, which is a key characteristic of interference filters. The sensitivity of these filters is a result of their sharp tuning to specific wavelengths, but they do not exhibit a high half-height bandwidth.

The other characteristics associated with interference filters would typically refer to their sensitivity and the idea that they transmit specific wavelengths, which aligns with their functionality in optical applications.