Matt Duff, an INamp specialist from Analog Devices has some youtube videos discussing opamp noise math.
YouTube - Noise of a Non-inverting Operational Amplifier Circuit
YouTube - Calculating RMS Noise to Peak-to-Peak Noise
YouTube - Noise of a Non-inverting Operational Amplifier Circuit
YouTube - Noise of a Non-inverting Operational Amplifier Circuit
YouTube - Calculating RMS Noise to Peak-to-Peak Noise
YouTube - Noise of a Non-inverting Operational Amplifier Circuit