the focal lenght of a plano -convex lens of refractive index 1.5 is 20cm. find the radius of curvature of the curved surface of the lens.​

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2

True or false graphs must include scales that increase by the same amount