Write approximate wavelength for (i) blue (ii) red light. Which colour

1.	Write approximate wavelength for (i) blue (ii) red light. Which colour has the higher speed in vacuum? Which colour has the higher speed in glass?
Answer» (i) The wavelength of blue light is nearly 4600Å. (ii) The wavelength of red light is nearly 7900Å. Both colours have the same speed in vacuum. Red light has the higher speed in glass.

Write approximate wavelength for (i) blue (ii) red light. Which colour has the higher speed in vacuum? Which colour has the higher speed in glass?

Answer»

(i) The wavelength of blue light is nearly 4600Å.

(ii) The wavelength of red light is nearly 7900Å.

Both colours have the same speed in vacuum. Red light has the higher speed in glass.