Write a short note on light.
(N/A) Nature has endowed the human eye (retina) with the sensitivity to detect electromagnetic waves within a small range of the electromagnetic spectrum.
Electromagnetic radiation belonging to this region of the spectrum (wavelength of about $400 \ nm$ to $750 \ nm$) is called light.
It is mainly through light and the sense of vision that we know and interpret the world around us.
Electromagnetic radiation belonging to this region of the spectrum (wavelength of about $400 \ nm$ to $750 \ nm$) is called light.
It is mainly through light and the sense of vision that we know and interpret the world around us.
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Similar Questions
Which of the following electromagnetic waves has the longest wavelength?
Easy
View SolutionConsider the following statements regarding the electromagnetic spectrum:
$(A)$ The wavelength of microwaves is greater than that of $UV$ rays.
$(B)$ The wavelength of $IR$ rays is less than that of $UV$ rays.
$(C)$ The wavelength of microwaves is lesser than that of $IR$ rays.
$(D)$ Gamma rays have the shortest wavelength in the electromagnetic spectrum.
Which of the above statements are true?
$(A)$ The wavelength of microwaves is greater than that of $UV$ rays.
$(B)$ The wavelength of $IR$ rays is less than that of $UV$ rays.
$(C)$ The wavelength of microwaves is lesser than that of $IR$ rays.
$(D)$ Gamma rays have the shortest wavelength in the electromagnetic spectrum.
Which of the above statements are true?
Medium
View SolutionThe frequencies of $X-$rays,$\gamma-$rays and ultraviolet rays are respectively $p, q$ and $r$. Then which of the following is correct?
Match List-$I$ with List-$II$:
List-$I$ List-$II$ $(a)$ Ultraviolet rays $(i)$ Study crystal structure $(b)$ Microwaves $(ii)$ Greenhouse effect $(c)$ Infrared waves $(iii)$ Sterilizing surgical instruments $(d)$ $X$-rays $(iv)$ Radar system
Choose the correct answer from the options given below:
| List-$I$ | List-$II$ |
|---|---|
| $(a)$ Ultraviolet rays | $(i)$ Study crystal structure |
| $(b)$ Microwaves | $(ii)$ Greenhouse effect |
| $(c)$ Infrared waves | $(iii)$ Sterilizing surgical instruments |
| $(d)$ $X$-rays | $(iv)$ Radar system |
Choose the correct answer from the options given below:
Both $X$-rays and $\gamma$-rays are electromagnetic waves. Which of the following statements is true for them?
Easy
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