help@askiitians.com

+91-87964 74404

Grade 12Wave Optics

The origin of x and y coordunates is the pole of a concave mirror of focal length 20 cm. The x axis is the optical axis with x>0 being the real side of mirror. A point object(25cm,1cm) is moving with a velocity 10 cm/sec in positive x direction. Find velocity of image?..plz help

Adam

7 Years agoGrade 12

5 Answers

Suhita singh

7 Years ago

1/v+1/u=1/f

for concave mirror

1/v+1/-25=1/-20

V=-100cm

Now magnification=-v/u=-(-100/-25)=-4

Now velocity of image=-m×m×velocity of object

therefore V(image)=-(-4×-4)×10=160cm/s(-x axis direction)

Adam

7 Years ago

You have only given x coordinate answer for the question please Give answer for y coordinate of asked question also?

Suhita singh

7 Years ago

Since y-axis position coordinate is not changing and their is no velocity of object in y- axis therefore velocity of image in y-axis direction is zero

Adam

7 Years ago

U is changing ..therfore height of objecy is changing...and hence there will be velocity component in vertucal direction

jon tayson

4 Years ago

velocity of immage = [-160 i + 8 j ] cm/s

it means it moves with 160cm/s in negative x-direction and moves with 8cm/s in y direction .

what is meant by refractive index?

wave optics

1 Answer Available

Last Activity: 9 Months ago

An oscillator consists of a block of mass 512 g connected to a spring. When set into oscillation with amplitude 34.7 cm, it is observed to repeat its motion every 0.484 s. Find (a) the period, (b) the frequency, (c) the angular frequency, (d) the force constant, (e) the maximum speed, and ( f ) the maximum force exerted on the block.

wave optics

1 Answer Available

Last Activity: 4 Years ago

A PLANE TRANSMISSION GRATING HAS 45000 LINES. DETERMINE ITS RESOLVING POWER IN THE SECOND ORDER FOR WAVELENGTH OF 5000A.

wave optics

1 Answer Available

Last Activity: 4 Years ago

A PLANE TRANSMISSION GRATING HAS 45000 LINES. DETERMINE ITS RESOLVING POWER IN THE SECOND ORDER FOR WAVELENGTH OF 5000A.

wave optics

1 Answer Available

Last Activity: 4 Years ago

If V-numer of a multi mode fiber is 3. Calculate the no.of modes if it is step index and graded index fiber multimode fiber (rounded off)?

wave optics

1 Answer Available

Last Activity: 4 Years ago

View all Questions