The figure shows a square block of glass JKLM with a ray of light incident on side JK at an angle of incidence of 60°. The refractive index of the glass is 1.50.

a. Calculate the angle of refraction of the ray. 

b Calculate the critical angle for a ray of light in this glass.

c. Explain why the ray shown cannot emerge from side KL but will emerge from side LM.

Copy the sentences below and use one of the three phrases above to complete each sentence. Each phrase may be used once, more than once or not at all.

i. The wavelength of radio waves is ___________ the wavelength of ultraviolet radiation.

ii. In a vacuum the speed of ultraviolet radiation is ________ the speed of light.

iii. The frequency of ultraviolet radiation is _________ the frequency of infrared radiation.

b. Name the part of the electromagnetic spectrum that is used to:

i. Send information to and from satellites

ii. Kill harmful bacteria in food.

Transcribed Image Text:

K 60 M.