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MatroZZZ [7]
3 years ago
6

An inverted image of an object is viewed on a screen from the side facing a converging lens. An opaque card is then introduced c

overing only the upper half of the lens. What happens to the image on the screen?
Physics
1 answer:
Marta_Voda [28]3 years ago
5 0

Answer:

d) The image would be dimmer

Explanation:

When inverted image of an object is viewed on a screen from the side facing a converging lens, the

lens focuses the diverging, and blurred light rays from the distance object through refraction of the rays two times.Then the rays is converge by the double bending cl at a focal point behind the lens inorder for a sharper image to be be observed.

But when an opaque card is then introduced to cover only the upper half of the lens then the image becomes dimmer because of the reduction in the light intensity on the screen by 50%

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The number of wavelengths that pass a given point/second is called
myrzilka [38]

Answer:

I believe the answer is frequency

Hope this helps!! (let me know if it is right)

Explanation:

6 0
3 years ago
Is the visible light color spectrum a small segment of the electromagnetic spectrum?
VMariaS [17]

Answer:

Yes

Explanation:

The visible light color spectrum only makes up a small segment of the EM spectrum

7 0
3 years ago
What is the difference between a mixture and a pure substance? Give an example of each.
suter [353]

Answer:

A pure substance (an element or a compound) is made up of only one type of atom, or molecule.

Examples: water (H2O molecules), oxygen (O2 molecules), argon (Ar atoms).

A mixture is made of up of more than one type of atom or molecule.

Examples: salt water (H2O molecules, Na+ ions, Cl- ions),

air (N2 molecules, O2 molecules, Ar atoms, CO2 molecules)

Note: the composition of a pure substance is fixed, but the composition of a mixture can vary. Two salt water solutions might not have the same concentration of salt. Or, if you prefer, one blueberry muffin might have more blueberries in it than another blueberry muffin.

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5 0
4 years ago
If a display has a dynamic range of 20 dB and the smallest voltage it can handle is 200 mV, then the largest voltage it can hand
DedPeter [7]

Answer:

The largest voltage is 0.02 V.

(d) is correct option.

Explanation:

Given that,

Range = 20 dB

Smallest voltage = 200 mV

We need to calculate the largest voltage

Using formula of voltage gain

G_{dB}=10 log_{10}(\dfrac{V_{out}^2}{V_{in}^{2}})

20 =10 log_{10}(\dfrac{V_{out}^2}{V_{in}^{2}})

2=log_{10}(\dfrac{V_{out}^2}{V_{in}^{2}})

10^2=\dfrac{V_{out}^2}{V_{in}^{2}}

\dfrac{V_{out}}{V_{in}^}=10

V_{in}=\dfrac{V_{out}}{10}

V_{in}=\dfrac{200}{10}

V_{in}=20\ mV

V_{in}=0.02\ V

Hence, The largest voltage is 0.02 V.

8 0
3 years ago
The pages of a book are numbered 1 to 200 and each
never [62]

Answer:

10.4mm

Explanation:

2 pages = 1 leaf

200 pages = 100 leaves

100 × 0.10 = 10 mm thickness

Total thickness = 2(0.20) +10 = 0.4+10 = 10.4mm

6 0
3 years ago
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