Hot questions

0 votes

0 answers

Two thin lenses of power + 6D and -2 D are in contact. What is the focal length of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two monochromatic rays of light are incident normally on the face AB of an isosceles right-angled prism AB C. The refractive indices of the glass prism for the two rays 1 and 2 are respectively 1.35 and 1.45. Trace the path of these rays after entering through the prism.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Find the position of the image formed of the object O by the lens combination given in the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

With the help of a suitable ray diagram, derive a relation between the object distance (u), image distance (v) and radius of curvature R for the convex spherical surface when a ray of light travels from a rarer to denser

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A short object of length L is placed along the principal axis of a concave mirror away from focus. The object distance is u. If the mirror has a focal length f, what will be the length of the image? You may take L <<|v -

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In many experimental set-ups the source and screen are fixed at a distance say D and the lens is movable. Show that there are two positions for the lens for which an image is formed on the screen. Find the distance between these points and the ratio of the image sizes for these two

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A gravitational lens may be assumed to have a varying width of the form Show that an observer will see an image of a point object as aring about the center of the lens with an angular radius`W(b)=k_1` ln `k_2/b`

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find the distance of the third bright fringe on the screen from the central maximum for wavelength 650

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

What is the Brewster angle for air to glass transition? (Refractive index of glass =

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Estimate the distance for which ray optics is good approximation for an aperture of 4 mm and wavelength 400

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two towers on top of two hills are 40 km apart. The line joining them passes 50 m above a hill halfway between the towers. What is the longest wavelength of radio waves, which can be sent between the towers without appreciable diffraction

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In deriving the single slit diffraction pattern, it was stated that the intensity is zero at angles of nλ/a. Justify this by suitably dividing the slit to bring out the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Sketch the shape of wavefront emerging from a point source of light and also mark the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Define a

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The figure shows a double slit experimental set up for observing interference fringes due to different interference component colours of white light. What would be the predominant colour of the fringes observed at the point.(i) O (the central point) (ii) P, where, `S_2P - S_1P =(lambda_b)/2` ? (here, `lambda_b` is the wavelength of the blue

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In Young's double slit experiment, the two slits 0.15 mm apart are illuminated by monochromatic light of wavelength 450 nm. The screen is 1.0 m away from the slits. (i) Find the distance of the second (a) bright fringe(b) dark fringe from the central maximum. (ii) How will the fringe pattern change if the screen is moved away from the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In Young's double slit experiment, monochromatic light of wavelength 630 nm illuminates the pair of slits and produces an interference pattern in which two consecutive bright fringes are separated by 8.1 mm . Another source of monochromatic light produces the interference pattern in which the two consecutive bright fringes are separated by 7.2 mm. Find the wavelength of light from the second source. What is the effect on the interference fringes, is when monochromatic source is replaced by a source of white

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

For light diverging from a point

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The threshold frequency for a certain metal is 3.3 × 1014 Hz. If light of frequency 8.2 × 1014 Hz is incident on the metal, predict the cutoff voltage for the photoelectric

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Answer the following questions: What is so special about the combination e/m? Why do we not simply talk of e and m

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

Hot questions

Categories