Consider the following three statements: (i) for any electro-magnetic radiation, the product of the wavelength and the frequency is a constant. (ii) if a source of light has a wavelength of 3.0 å, its frequency is 1.0*1018 hz. (iii) the speed of ultra-violet light is greater than the speed of microwave radiation. which of these three statements is or are true?

A and B

Explanation:

The relation between frequency and wavelength is shown below as:

c is the speed of light having value

Thus, the product of the wavelength and the frequency is constant and equal to

Option A is correct.

Given, Frequency =

Thus, Wavelength is:

Also, 1 m = Å

So,

Wavelength = 3.0 Å

Option B is correct.

As stated above, the speed of electromagnetic radiation is constant. Hence, each radiation of the spectrum travels with same speed.

Option C is incorrect.

Option (i) For any electro-magnetic radiation, the product of the wavelength and the frequency is a constant.

(ii) If a source of light has a wavelength of 3.0 Å, its frequency is 1.0*1018 Hz.

Explanation:

The wave equation is given as:

where f  = frequency

           λ = wavelength

Thus, the product of the wavelength and frequency produces a velocity of the wave not a constant.

The velocity of the wave depends of both properties.

(ii) The wavelength of the light changes depending on the source of the radiation. Thus, the frequency is not constant or universal for one form of a wave.

Therefore statements (i) and (ii) are false.

the closer the planet is to the sun, the larger the gravity

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation