Recent content by vetgirl1990

The original question does indeed say minimum.

Homework Statement The centres of two slits of width a are a distance d apart. If the fourth minimum of the interference pattern occurs at the location of the first minimum of the diffraction pattern for light, the ratio a/d is equal to: ANS: 1/4 Homework Equations Here are the various...

It seems like a lot of other students in the class were having problems with the question -- not getting one of the options listed as a MC answer. This is how our professor told us it must be solved: " It is long three step problem. 1) you need to find the total energy/power received but the...

Homework Statement Two parallel glass plates of index of refraction n are separated by an air film of thickness d. Light of wavelength λ in air, normally incident on the plates, is intensified on reflection when, for some integer m a) 2d=mλ b) 2d=mλ/n c) 2d=mnλ d) 2d=(m+1/2)λ e) 2d=mλ/2...

Ohhh, this makes so much sense, thank you! Luminosity is a new concept to me as we didn't learn the equation in class, but it can easily be applied without the equation -- just considering that light radiates from an object in a sphere, and the fact that we are given orbit radius. How do you...

Homework Statement The first unmanned probe will reach the stellar system of the Alfa Centauri (estimated radius 5x104 km) in year 2145. The probe will enter stationary orbit of radius R 300 x106km around the star. In order to power itself the probe will convert the radiative energy received by...

I just realized what I did wrong. The distance is L/2, so the moment of inertia equation turns into: I = 1/3mL2 So then ω2 = mg(L/2) / (1/3)mL2 Therefore T = 2π √2L/3g Thanks!

Homework Statement A uniform rod of mass m and length L is freely pivoted at one end. What is the period of its oscillations? Icm for a uniform rod rotating about its centre of mass is 1/12mL2 (a) √3g/2L (b) 2π √3L/2g (c) 2π √2L/3g (d) 2π √L/g (e) none of the above Homework Equations ω2 =...

3x^2 -8rx +4r^2 =3x^2 -2rx -6rx +4r^2 =x(3x-2r) -2r(3x-2r) =(3x-2r)(x-2r) :)

I'm not quite sure I understand what you mean.

Partially. I'm just studying for a physics exam. While I understand the physics behind this particular question, I'm just stuck on how to solve for the final answer from the above expression. Perhaps I should have posted it in the homework questions folder?

How do you solve 4a2 - 8ab + 3b2=0? I know there are general formulae, but I'm not sure how to use them: a2-2ab+b^2 = (a-b)2 a2+2ab+b^2= (a+b)2 a2-b2 = (a+b)(a-b)

Homework Statement A 0.7MeV (E°) photon scatters off a free electron such that the scattering angle of the photon is twice the scattering angle of the electron (θ=2φ). Determine the scattering angle for the electron. Homework Equations λ' - λ° = h/(mec)(1-cosθ) E = hc/λ ρelectron = mev /...

Homework Statement In a double slit experiment, the distance between the slits is 0.2mm and the distance to the screen is 150cm. What is the phase difference in degrees, between the waves from the two slits arriving at point P, when the angular distance of P is 10 degrees relative to the...

Ah I see! sin-1 is automatically calculating my answer in degrees already. Thank you for your help and patience!