Our eyes detect light only within a range of frequencies called visible light.
Answer:
"When face is placed between the concave mirror and its focus, it produces a magnified image. This enlarged image of face is helpful in makeup as even pores of skin are clearly visible."
Answer:
It converts light into electric current.
Explanation:
The first line of the description says that the photometer is a device that converts light to voltage. if the voltage can be measured then current flowing through it can be calculated by Ohms law V=IR.
<em>Hence the photometer converts light to electric current.</em>
The photometer is used to measure the strength of electromagnetic radiation falling on it and operate within the range of ultraviolet ,visible and infrared spectrum.
It converts light to electric current using photodiode (pn junction),photoresistor and photmultiplier.
Answer:
θ = 53.13° above horizontal
Explanation:
Ignore air resistance.
The time the ball takes to reach its max height will equal the time to travel half the max range R.
√(2h/g) = (R/2)/vcosθ
vsinθ/g = R/2vcosθ
2v²sinθcosθ = Rg
2v²sinθcosθ = 3hg
v² = u² + 2gh
0² = v²sin²θ + 2gh
v²sin²θ = 2gh
v² = 2gh/sin²θ
2v²sinθcosθ = 3hg
(2gh/sin²θ)2sinθcosθ = 3hg
(2/sinθ)2cosθ = 3
cotθ = 3/4
θ = 53.130
