What physical quantity is the same for X-rays of wavelength10–10 m, red light of wavelength 6800 Å and radiowaves of wavelength 500m?

Open in App

Solution

It is given that the wavelength of X-rays is 10 −10 m and the wavelength of the red light is 6800 A ∘ and the wavelength of radio waves is 500 m.

The speed of the light in vacuum will be the same for all wavelengths and it will be independent of the wavelength in the vacuum.

The value of speed of light is 3× 10 8 m/s.

Hence, we can say that the speed of light is the physical quantity which is same for all wavelengths in a vacuum.

Suggest Corrections

Similar questions

Q. Find the energy of photon in each of the following:
A. Microwaves of wavelength

1.5 c m

B. Red light of wavelength

660 n m

C. Radiowaves of frequency

96 M H z

X -

rays of wavelength

0.17 n m

Of the following radiation with

(i)Maximum wavelength out of UV, Radiowaves, x-rays, IR

(ii) Lowest frequency out of IR,wavelength out of UV, Radiowaves, x-rays, IR

(ii) Lowest frequency out of IR, ϒ-rays, cosmic rays and microwaves

Arrange the rays in electromagnetic spectrum according to the increasing order of wavelength.
(1) Infrared rays, (2) X rays, (3) Radiowaves, (4) Microwaves, (5) Gamma rays, (6) UV rays.

Q. Name the physical quantity which remains same for microwaves of wavelength

1 m m

and

U V

radiations of

1600 \circ A

in vacuum.

Q. Arrange the following electromagnetic waves in the order of their increasing wavelength:
(a)

γ - r a y s

(b) Microwaves
(c)

X - r a y s

(d) Radio waves
How are infra-red waves produced? What role does infra-red radiation play in (i) maintaining the Earth's warmth and (ii) physical therapy?

Join BYJU'S Learning Program