Question

Asked Mar 31, 2019

7 views

An object 4.8 cm tall is 38.0 cm from a concave lens. The resulting image is two-fifths as large as the object. What is the focal length of the lens? cm

Step 1

Let us say that the object distance is ‘u’ and the image distance is ‘v’ from the optical centre of the lens. Also, the focal length of the lens is ‘f’. The formula of the lens is defined below:

Step 2

Now, the magnification is given as m = 2/5 and u = -38 cm. As, it is a concave lens, so, both image and object will be on the left-hand side thus, both v and u will be negative. So, the relation between ‘u’ and ‘v’ will be:

Step 3

Now, let us calculate t...

Find answers to questions asked by student like you

Show more Q&A

Q: Calculate the number of coulombs of positive charge in 198 cm3 of (neutral) water. (Hint: A hydrogen...

A: Mass of 198cm3 of water is,Substituting the values,

Q: a box is moved 10 m across a smooth floor by a force making a downward angel with the floor, so that...

A: Work done is,

Q: 17. Review. Piston in Figure P14.17 has a diameter of 0.250 in. Piston 2 has a diameter of 1.50 in. ...

A: Given,

Q: One hazard of space travel is debris left by previous missions. There are several thousand masses la...

A: The relation between force and momentum is,

Q: An electric field given by = 4.8 - 2.7(y2 + 7.5) pierces the Gaussian cube of edge length 0.460 m an...

A: The figure with the direction vectors is shown below:

Q: pipe 6-77 Water is flowing into and discharging from U-section as shown in Fig. P6-77. At flange (1)...

A: Let m denotes the mass flow rate, A denotes the area of the opening, P denotes the pressure and ρ de...

Q: Light in vacuum is incident on the surface of a slab of transparent material. In the vacuum the beam...

A: The ray diagram of refraction is given below in which light makes angle with normal.

Q: The figure shows a parallel-plate capacitor with a plate area A = 2.52 cm2 and plate separation d = ...

A: When capacitors are connected in series, the total capacitance is less than any one of the series ca...

Q: A 2.41 kg the ball is attached to an unknown spring and allowed to oscillate. The figure (Figure 1) ...

A: a)The time period of the motion is,