Search Results

11 results for “index”

Formulae (11)

n_1 \sin\theta_1 = n_2 \sin\theta_2

Light bends when passing between media of different refractive index.

n = \frac{c}{v}

Ratio of light speed in vacuum to that in a medium.

H = -\sum p_i \ln p_i

Measures species diversity in a community.

D = 1 - \sum p_i^2

Probability two random individuals differ in species.

BMI = \frac{m}{h^2}

Weight-to-height ratio used to classify body weight.

FFMI = \frac{LBM}{h^2}

Muscularity index normalised for height.

PI = \frac{m}{h^3}

A leanness index that scales better for extreme heights.

Deflator = \dfrac{Nominal\ GDP}{Real\ GDP}\times 100

A broad price index covering all goods in GDP, not just a consumer basket.

CPI = \frac{\text{Basket now}}{\text{Basket base}}\times 100

Measures price levels relative to a base year.

\pi = \frac{CPI_1 - CPI_0}{CPI_0}\times 100

Percentage change in the price index.

BMI = \frac{m}{h^2}

Weight-to-height ratio used as a health screening tool.