The closest object that a typical young person with normal vision can focus on clearly is closest to
A) 1 cm.
B) 10 cm.
C) 25 cm.
D) 50 cm.
E) 75 cm.
Question 2
A blue photon
A) has a smaller wavelength than a red photon and travels with the same speed.
B) has a smaller wavelength than a red photon and travels with a greater speed.
C) has a longer wavelength than a red photon and travels with the same speed.
D) has a longer wavelength than a red photon and travels with a greater speed.