Bright light is found to emit from photographers flashgun. This brightness is due to the presence of which one of the following noble gases?

examrobotsa's picture

Submitted by examrobotsa on

Q: 28 (CDS-I/2018)
Bright light is found to emit from photographer’s flashgun. This brightness is due to the presence of which one of the following noble gases?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,23,59,19,23,28,12

keywords: 

{'noble gases': [0, 0, 1, 1], 'helium': [0, 0, 1, 0], 'neon': [1, 0, 1, 3], 'bright light': [0, 0, 0, 1], 'flashgun': [0, 0, 0, 1], 'brightness': [0, 0, 0, 1], 'argon': [2, 0, 3, 6], 'xenon': [0, 0, 1, 1]}

The correct answer is option- 2 Xenon. The bright light emitted from a photographer`s flashgun is due to the presence of xenon gas. This gas is classified as a noble gas, which means it is an element that is stable and does not easily react with other elements.

Xenon is commonly used in flash lamps because it emits a bright white light when an electric current is passed through it. This makes it ideal for photography as it produces a strong burst of light that can illuminate a subject in dark or low-light conditions.

Option- 1 Argon is also a noble gas, but it is not typically used in flash lamps as it emits a weaker light compared to xenon.

Option- 3 Neon is another noble gas, but it is not commonly used in flash lamps either. Neon emits a red-orange light, which is not as bright as the white light produced by xenon.

Option- 4 Helium is also a noble gas, but it does not emit a bright light when used in a flash lamp. Helium is commonly used in balloons due to its low density and is not suitable for producing the intense light needed for photography.

Therefore, the correct answer is option- 2 Xenon.