During a daytime football game you notice that a player\'s reflective helmet for

ID: 1618455 • Letter: D

Question

During a daytime football game you notice that a player's reflective helmet forms an image of the Sun 4.7 cm behind the surface of the helmet.

Part A

What is the radius of curvature of the helmet, assuming it to be roughly spherical?

Express your answer using two significant figures.

During a daytime football game you notice that a player's reflective helmet forms an image of the Sun 4.7 cm behind the surface of the helmet.

Part A

What is the radius of curvature of the helmet, assuming it to be roughly spherical?

Express your answer using two significant figures.

R =

Since the distance of sun from the helmet is huge as compared to the radius of curvature of helmet so do can be considered as infinite

Now when object is at infinity image is formed at focus hence f = 4.7 cm

So R = 2f = 9.4 cm

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