Question

The speed of light in air is
(a) 3 × 108 cm/s
(b) 3 × 108 mm/s
(c) 3 × 108 km/s
(d) 3 × 108 m/s

Answer 1

Answer:

$\bold\red{(d)3\times{10}^{8}\:m{s}^{-1}}$

Additional Information:

• Speed of light is maximum in vaccum and air.

• The speed of light travels in a straight line.

• The speed of light travels and is transmitted through small particles called photons which have their photonic energy.

• The light has dual type of character.

• It shows both particle type and wave type character.

• When light travels from rarer medium to denser one, it's speed slightly decreases depending upon the refractive index of that medium and vice - versa.

• The light follows many natural phenomena like reflection, refraction and deflection.