Q: 104 (IAS/2001)

When lightwaves pass from air to glass, the variables affected are
question_subject: 
Science
question_exam: 
IAS
stats: 
0,16,58,28,10,20,16
keywords: 
{'wavelength': [0, 0, 3, 3], 'lightwaves': [0, 0, 1, 0], 'glass': [0, 0, 1, 4], 'velocity': [0, 2, 2, 6], 'frequency': [0, 0, 1, 3], 'variables': [0, 1, 1, 1]}

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