In fog, photographs of the objects taken with infrared radiations are more clear than those obtained during visible light because

In burglar alarm, infrared beam of light is used instead of visible light, because

In burglar alarm, infrared beam of light is used instead of visible light, because

X-rays are electromagnetic radiations of wavelength greater than that of visible light.

Mention three properties of infrared radiations similar to visible light.

Give two properties of infrared radiations which differ from visible light.

Electromagentic radiation, which of the following has greater wavelength than visible light

Consider the following types of electromagnetic radiation: radiowaves, infra-red, vissible light. Which of the following statements are correct? (i) Only radiowaves can be used to transmite audio information. (ii) Only infrared radiation is emitted by very hot object. (iii) Only visible light can be detect by humans.

Diffraction effects are more easily detected in the case of sound waves than light waves because